Q: I need help on bibliography formats for all types of materials, esp. in encyclopedias, magazines....etc
A: I think you mean to say "esp. of encyclopedias..." not "esp. in encyclopedias..."
Citation is made in some kinds of writing where the author points to other writings (but also movies and other media) for scholarly, helpful and other reasons.
The citation usually appears in the text, with a description later of the source. For example, I make mention of a book in a sentence in my paper (or article or book...). At the bottom of the page, or at the end of the chapter, or at the end of the book, I list some information about the book. Usually enough information so that my reader can get a hold of it.
How the citation appears in the text, and how the entry or item appears in the foot of the page or in the end matter depends on the conventions of that publisher or teacher.
If you want to find out how a bibliography entry looks in an encyclopedia, look. If you want to know how an entry of an encyclopedia should look for a paper in this or that journal, for this scholarly book publisher, or for your teacher, ask for their "rule" book.
The number of rule books (sometimes called style guides) and rules is large. Not only can books be cited, but songs, radio shows, private conversations, music videos, ads, chewing gum wrappers... If you were self-published, you could make up your own rules about how the citation and bibliography looked. But you might want to be helpful to your reader.
When you first look at bibliographies and their conventions, it can be a bit tangled. Just remember your reader.
