Gaya APA

Polan, E, U., Taylor, D, R. (2015). Journey across the life span : human development and health promotion (5th ed.). Philadelphia: F.A. Davis Company.

Gaya MLA

Polan, Elaine, U.., Taylor, Daphne, R.. "Journey across the life span : human development and health promotion". 5th ed. Philadelphia: F.A. Davis Company, 2015. Text.