Hurlock, E. B. (1980). Development psychology: A life span approach (5th ed.). Tata McGraw-Hill pub.

Hurlock, Elizabeth B. Development Psychology: A Life Span Approach. 5th ed. New Delhi: Tata McGraw-Hill pub, 1980.

Hurlock, Elizabeth B. Development Psychology: A Life Span Approach. 5th ed. Tata McGraw-Hill pub, 1980.