APA (7e ed.) Bronvermelding

SACK, S. M., & STEINBERG, H. J. (1981). The salesperson's legal guide. Prentice-Hall.

Chicago (17e ed.) Bronvermelding

SACK, Steven Mitchell, en Howard Jay STEINBERG. The Salesperson's Legal Guide. New Jersey: Prentice-Hall, 1981.

MLA (9e ed.) Bronvermelding

SACK, Steven Mitchell, en Howard Jay STEINBERG. The Salesperson's Legal Guide. Prentice-Hall, 1981.