Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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