Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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