Cita APA (7th ed.)
Newman, B. M., & Newman, P. R. (2012). Life-span development: A psychosocial approach (11th ed.). Wadsworth Cengage Learning.
Cita Chicago (17th ed.)
Newman, Barbara M., i Philip R. Newman. Life-span Development: A Psychosocial Approach. 11th ed. Singapore: Wadsworth Cengage Learning, 2012.
Cita MLA (9th ed.)
Newman, Barbara M., i Philip R. Newman. Life-span Development: A Psychosocial Approach. 11th ed. Wadsworth Cengage Learning, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.