APA (7th ed.) Citation

Cather, W. (1961). My mortal enemy (1. ed.). Vintage Books.

Chicago Style (17th ed.) Citation

Cather, Willa. My Mortal Enemy. 1. ed. New York: Vintage Books, 1961.

MLA (9th ed.) Citation

Cather, Willa. My Mortal Enemy. 1. ed. Vintage Books, 1961.