APA (7th ed.) Zitazioa
Becker, D., & Becker, P. B. (1993). Speaking skills for business careers. Irwin Mirror Press.
Chicago Style (17th ed.) Zitazioa
Becker, Dennis, eta Paula Borkum Becker. Speaking Skills for Business Careers. Homewood, IL: Irwin Mirror Press, 1993.
MLA (9th ed.) Zitazioa
Becker, Dennis, eta Paula Borkum Becker. Speaking Skills for Business Careers. Irwin Mirror Press, 1993.
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