Dyfyniad APA
Hurlock, E. B. (1980). Development psychology: A life span approach (5th ed.). Tata McGraw-Hill pub.
Dyfyniad Arddull Chicago
Hurlock, Elizabeth B. Development Psychology: A Life Span Approach. 5th ed. New Delhi: Tata McGraw-Hill pub, 1980.
Dyfyniad MLA
Hurlock, Elizabeth B. Development Psychology: A Life Span Approach. 5th ed. Tata McGraw-Hill pub, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.