SACK, S. M., & STEINBERG, H. J. (1981). The salesperson's legal guide. Prentice-Hall.
Chicago-čujuhus (17. p.)SACK, Steven Mitchell, juo Howard Jay STEINBERG. The Salesperson's Legal Guide. New Jersey: Prentice-Hall, 1981.
MLA-čujuhus (9. p.)SACK, Steven Mitchell, juo Howard Jay STEINBERG. The Salesperson's Legal Guide. Prentice-Hall, 1981.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.