APA (7th ed.) Citation

Hofstadter, D. R. (2007). I am a strange loop. Basic Books.

Chicago Style (17th ed.) Citation

Hofstadter, Douglas R. I Am a Strange Loop. New York: Basic Books, 2007.

MLA (9th ed.) Citation

Hofstadter, Douglas R. I Am a Strange Loop. Basic Books, 2007.