APA (7 वां संस्करण) प्रशस्ति पत्र

Khush, G. S., & Virk, P. (2005). IR varieties and their impact. International Rice Research Institute.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Khush, Gurdev S., और P.S Virk. IR Varieties and Their Impact. [Los Banos, Laguna]: International Rice Research Institute, 2005.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Khush, Gurdev S., और P.S Virk. IR Varieties and Their Impact. International Rice Research Institute, 2005.