Polan, E. U. (2007). Journey across the life span: Human development and health promotion (3rd ed.). F. A. Davis.
Cita Chicago (17th ed.)Polan, Elaine U. Journey Across the Life Span: Human Development and Health Promotion. 3rd ed. Philadelphia: F. A. Davis, 2007.
Cita MLA (9th ed.)Polan, Elaine U. Journey Across the Life Span: Human Development and Health Promotion. 3rd ed. F. A. Davis, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.