APA (7e ed.) Bronvermelding
Becker, D., & Becker, P. B. (1993). Speaking skills for business careers. McGraw-Hill.
Chicago (17e ed.) Bronvermelding
Becker, Dennis, en Paula Borkum Becker. Speaking Skills for Business Careers. New York: McGraw-Hill, 1993.
MLA (9e ed.) Bronvermelding
Becker, Dennis, en Paula Borkum Becker. Speaking Skills for Business Careers. McGraw-Hill, 1993.
Let op: Deze citaties zijn niet altijd 100% accuraat.