Question

Hi, My assignment this week was a persuasive letter. How do I cite the works used within my letter to persuade the reader? Thanks,

Answer 1

MLA style.

Answer 2

If it is a letter, which is more informal than most other forms of writing, you could just say, According to Francois Marie Lappe in Diet for a Small planet, eating beef is really...
If it is more formal you can use superscript and footnotes.

Answer 3

MLA style is standard, however, as Preetha states, you can also informally state it. It depends on what kind of a letter this is - is it academic? If so, your teacher would most liek the MLA style. Purdue Owl is great on citations: http://owl.english.purdue.edu/owl/resource/747/01/