APA (7 वां संस्करण) प्रशस्ति पत्र

WALKER, H. M. (1969). Elementary statistical methods. Holt, Rinehart and Winston.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

WALKER, Helen M. Elementary Statistical Methods. New York: Holt, Rinehart and Winston, 1969.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

WALKER, Helen M. Elementary Statistical Methods. Holt, Rinehart and Winston, 1969.