APA (7th ed.) Citation

Hofstadter, D. R. (1999). Godel, Escher, Bach: An eternal golden braid (Twentieth anniversary edition.). Basic Books.

Chicago Style (17th ed.) Citation

Hofstadter, Douglas R. Godel, Escher, Bach: An Eternal Golden Braid. Twentieth anniversary edition. New York: Basic Books, 1999.

MLA (9th ed.) Citation

Hofstadter, Douglas R. Godel, Escher, Bach: An Eternal Golden Braid. Twentieth anniversary edition. Basic Books, 1999.