Each citation is composed from a set of bibliographic elements, which are specific categories of information for things like an author's name, a work's title, or a journal article's publisher. Citation styles (e.g., MLA, APA, Chicago) might look a bit different from each other or have different rules about things like ordering the bibliographic elements within a citation, but the basic bibliographic elements you need to include within a citation stay the same across citation styles.
These are common categories of information that go into most (but not all) citations. (Certain types of sources will not need to include all of these bibliographic elements. For example, print books probably don't have a DOI or URL, and web content may not have formal publication or pagination information, and you may need to treat the content publisher as the creator, too, if a named author isn't listed.)
Below are examples of where you can find the bibliographic elements of citations in common types of sources you might use in your research. It is important to be aware that different publications will put the information in different places! Look at the PDF examples to get a better idea of where to look in your sources to find key bibliographic elements.
If you are looking at the record details for a print book or eBook in the library catalog:
If you are looking at the actual book (again, either in print or as an eBook):
These bibliographic elements are highlighted in the example of a book's title page and copyright pages below.
In an edited book with multiple authors, be sure check the table of contents for the Author, Chapter Title, and Pagination (page numbers) of the chapter. The book editor or editors will usually be on the book's title page instead of authors.
In the PDF example of an edited book below, these bibliographic elements are highlighted on the title, verso, and table of contents pages.
Bibliographic elements of a journal article will appear in different locations according to the journal in which the article was published and/or the database in which you found the article.
In EBSCO databases, such as Academic Search Premier, most bibliographic elements will be listed on the article record page you see when you first click on a title from the results list. In the example article record below, find the Article Title, Authors, Journal Title, Journal Volume and Issue, Publication Date, and Pagination (pages in the journal where the article is).
Bibliographic elements can also be found in the full text article PDF, usually along the top or bottom of the page. Where exactly the information will be located on the pages is the choice of the publisher, so pay careful attention to the margins of your article.
In the example below, the bibliographic elements for the journal volume and issue numbers and the publication year are at the top of the first page of the article. The first page also has the article title and the authors. On the second page the bibliographic elements for journal title, publication year, journal volume and issue numbers, and pagination are in the top left margin.
Bibliographic elements are essential to identify before assembling them into a citation following the format of a specific style.