... how to quote ...

I'm not sure this is what you're referring to, but there is a  <blockquote> ... quoted text ... </blockquote> tag that this site supports; see Markup in the Monastery and Writeup Formatting Tips. (Many monks, including myself, embed italics tags within the blockquote tags to further distinguish the quote. The end result is then <blockquote><i> ... </i></blockquote>.)