Citazione Stile APA (7a Edizione)

Hower, A., & Hower, N. (1938). Successful letter writing: Business and personal (1a. ed.). Garden City Books.

Citazione stile Chigago Style (17a edizione)

Hower, Aline, e Nels Hower. Successful Letter Writing: Business and Personal. 1a. ed. Nueva York: Garden City Books, 1938.

Citatione MLA (9a ed.)

Hower, Aline, e Nels Hower. Successful Letter Writing: Business and Personal. 1a. ed. Garden City Books, 1938.