How do I quote correctly in Usenet? - How do I quote other resources?
Every now and then you may wish to quote not only from the article you are responding to, but also give examples from books for example. To do so, simply put the text in quotes, as you would do when writing "normal" text. If you have a long quote, it is common to indent the text or you can use another quotationmark. To differentiate between the quotationmarks, it is common to use "|" (vertical bar). The use of another quotationmark has the advantage, that this way some newsreaders can highlight the text in a different fashion such as a different color or a different font.
No matter which style you choose: you always want to give the exact source of the quote (Author, Title, page, possibly edition and the year published), so others can check the quote.