Heizer, J. H., & Render, B. (2009). Operations management (9th ed., flexible version.). Pearson/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Heizer, Jay H., agus Barry Render. Operations Management. 9th ed., flexible version. Upper Saddle River, N.J: Pearson/Prentice Hall, 2009.
Lua MLA (9ú heag.)Heizer, Jay H., agus Barry Render. Operations Management. 9th ed., flexible version. Pearson/Prentice Hall, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.