Phillips, B. (1977). Effective business communications. Delmar Pub.
Cita Chicago (17th ed.)Phillips, Bonnie. Effective Business Communications. NULL: Delmar Pub, 1977.
Cita MLA (9th ed.)Phillips, Bonnie. Effective Business Communications. Delmar Pub, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.