Cita APA (7th ed.)

Barnes, G. A. (1994). English communication skills for professionals. National Textbook Company.

Cita Chicago (17th ed.)

Barnes, Gregory Allen. English Communication Skills for Professionals. Lincolnwood, Illinois USA: National Textbook Company, 1994.

Cita MLA (9th ed.)

Barnes, Gregory Allen. English Communication Skills for Professionals. National Textbook Company, 1994.