APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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