Cita APA (7a ed.)

Elfenbein, J. (1977). Business letters and communications. Alexander Hamilton Institute.

Cita Chicago Style (17a ed.)

Elfenbein, Julien. Business Letters and Communications. New York: Alexander Hamilton Institute, 1977.

Cita MLA (9a ed.)

Elfenbein, Julien. Business Letters and Communications. Alexander Hamilton Institute, 1977.