Cita APA (7th ed.)
Martel, M. (1984). Before you say a word: The executive guide to effective communication. Prentice-Hall.
Cita Chicago (17th ed.)
Martel, Myles. Before You Say a Word: The Executive Guide to Effective Communication. New Jersey: Prentice-Hall, 1984.
Cita MLA (9th ed.)
Martel, Myles. Before You Say a Word: The Executive Guide to Effective Communication. Prentice-Hall, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.