APA (7th ed.) Citation

Cowper, R. (1975). I at the keyhole. Stein and Day.

Chicago Style (17th ed.) Citation

Cowper, Richard. I at the Keyhole. Briarcliff Manor, N.Y.: Stein and Day, 1975.

MLA (9th ed.) Citation

Cowper, Richard. I at the Keyhole. Stein and Day, 1975.