How to quote
Question: I want to know when get information from other sources e.g. internet, different web sites books etc; at the end do I have to mention all the sources. I want to write about a church history.Answer:
It's a good idea to state what sources you are using, both in footnotes and in a separate bibliography section. This will help protect you from charges of plagiarism as well as establish your credibility as a researcher.
I would suggest you consult a good style guide, such as Butcher's Copy-editing: The Cambridge Handbook for Editors, Copy-editors and Proofreaders.
This should tell you how and when to cite references, as well as provide a wealth of other information on formatting your work.
Your local library may have a copy, if you don't want to purchase your own. But if you plan to write a lot of nonfiction, you may want to have such a guide at your fingertips throughout the writing and revision process.