Cita APA (7a ed.)

Elfenbein, J. (1973). Business letters and communication. Alexander hamilton Inc.

Cita Chicago Style (17a ed.)

Elfenbein, Julien. Business Letters and Communication. New York: Alexander hamilton Inc, 1973.

Cita MLA (9a ed.)

Elfenbein, Julien. Business Letters and Communication. Alexander hamilton Inc, 1973.