Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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