APA (7 वां संस्करण) प्रशस्ति पत्र

Keith-Lucas, A. (1972). Giving and taking help. University of North Carolina.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Keith-Lucas, Alan. Giving and Taking Help. Chapel hill: University of North Carolina, 1972.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Keith-Lucas, Alan. Giving and Taking Help. University of North Carolina, 1972.