APA (7th ed.) Zitazioa
Martel, M. (1984). Before you say a word: The executive guide to effective communication. Prentice-Hall.
Chicago Style (17th ed.) Zitazioa
Martel, Myles. Before You Say a Word: The Executive Guide to Effective Communication. New Jersey: Prentice-Hall, 1984.
MLA (9th ed.) Zitazioa
Martel, Myles. Before You Say a Word: The Executive Guide to Effective Communication. Prentice-Hall, 1984.
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