APA-referens (7:e uppl.)

Hansen, J. (1981). A smile in his lifetime: Joseph Hansen (1. Auflage.). Holt, Rinehart and Winston.

Chicago-referens (17:e uppl.)

Hansen, Joseph. A Smile in His Lifetime: Joseph Hansen. 1. Auflage. New York: Holt, Rinehart and Winston, 1981.

MLA-referens (8:e uppl.)

Hansen, Joseph. A Smile in His Lifetime: Joseph Hansen. 1. Auflage. Holt, Rinehart and Winston, 1981.