Sheffel, E. (2004). Study guide for use with Legal environment of business in the information age. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Sheffel, Evan. Study Guide for Use with Legal Environment of Business in the Information Age. Boston: McGraw-Hill, 2004.
Lua MLA (9ú heag.)Sheffel, Evan. Study Guide for Use with Legal Environment of Business in the Information Age. McGraw-Hill, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.