APA (7th ed.) Zitazioa

Becker, D., & Becker, P. B. (1993). Speaking skills for business careers. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Becker, Dennis, eta Paula Borkum Becker. Speaking Skills for Business Careers. New York: McGraw-Hill, 1993.

MLA (9th ed.) Zitazioa

Becker, Dennis, eta Paula Borkum Becker. Speaking Skills for Business Careers. McGraw-Hill, 1993.