Williams, B. K., Sawyer, S. C., & Berston, S. Business: A practical introduction.
Lua i Stíl Chicago (17ú heag.)Williams, Brian K., Stacey C. Sawyer, agus Susan Berston. Business: A Practical Introduction.
Lua MLA (8ú heag.)Williams, Brian K., et al. Business: A Practical Introduction.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.