Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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