Roy, R. N. (2005). A Modern Approach to Operations Management. New Age International.
Lua i Stíl Chicago (17ú heag.)Roy, Ram Naresh. A Modern Approach to Operations Management. New Delhi: New Age International, 2005.
Lua MLA (9ú heag.)Roy, Ram Naresh. A Modern Approach to Operations Management. New Age International, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.