APA (7 वां संस्करण) प्रशस्ति पत्र

Havighurst, R. J. (1972). Development tasks and education (3rd ed.). David McKay Company, Inc..

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Havighurst, Robert James. Development Tasks and Education. 3rd ed. New york: David McKay Company, Inc., 1972.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Havighurst, Robert James. Development Tasks and Education. 3rd ed. David McKay Company, Inc., 1972.