APA (7th ed.) Citation

Sigelman, C. K. (2012). Human development across the life span (7th edition.). Wadsworth/Cengage Learning.

Chicago Style (17th ed.) Citation

Sigelman, Carol K. Human Development Across the Life Span. 7th edition. Australia: Wadsworth/Cengage Learning, 2012.

MLA (9th ed.) Citation

Sigelman, Carol K. Human Development Across the Life Span. 7th edition. Wadsworth/Cengage Learning, 2012.

Warning: These citations may not always be 100% accurate.