Foster, F. H., & Shook, R. L. (1993). Patents, Copyrights & trademarks (2nd ed.). Wiley.
Chicago-čujuhus (17. p.)Foster, Frank H., juo Robert L. Shook. Patents, Copyrights & Trademarks. 2nd ed. New York: Wiley, 1993.
MLA-čujuhus (9. p.)Foster, Frank H., juo Robert L. Shook. Patents, Copyrights & Trademarks. 2nd ed. Wiley, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.