APA (7th ed.) Zitazioa

Elfenbein, J. (1972). Business letters and communications (1a. ed.). Alexander Hamilton Institute.

Chicago Style (17th ed.) Zitazioa

Elfenbein, Julien. Business Letters and Communications. 1a. ed. Nueva York: Alexander Hamilton Institute, 1972.

MLA (9th ed.) Zitazioa

Elfenbein, Julien. Business Letters and Communications. 1a. ed. Alexander Hamilton Institute, 1972.