APA (7th ed.) Citation

Mencken, H. L. (1977). Prejudices, third series. Octagon Books.

Chicago Style (17th ed.) Citation

Mencken, H. L. Prejudices, Third Series. New York: Octagon Books, 1977.

MLA (9th ed.) Citation

Mencken, H. L. Prejudices, Third Series. Octagon Books, 1977.