APA (7 वां संस्करण) प्रशस्ति पत्र

BENTLEY, R. (1992). Research and technology in the former German DemocraticRepublic. Westview.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

BENTLEY, Raymond. Research and Technology in the Former German DemocraticRepublic. Boulder: Westview, 1992.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

BENTLEY, Raymond. Research and Technology in the Former German DemocraticRepublic. Westview, 1992.