APA (7 वां संस्करण) प्रशस्ति पत्र

Speight, J. G. (2009). Enhanced recovery methods for heavy oil and tar sands. Gulf Pub. Co..

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Speight, James G. Enhanced Recovery Methods for Heavy Oil and Tar Sands. Houston, TX: Gulf Pub. Co., 2009.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Speight, James G. Enhanced Recovery Methods for Heavy Oil and Tar Sands. Gulf Pub. Co., 2009.