Cita APA (7th ed.)

Hillier, S. M., & Barrow, G. M. (2011). Aging, the individual, and society (Ninth edition.). Wadsworth/Cengage Learning.

Cita Chicago (17th ed.)

Hillier, Susan M., i Georgia M. Barrow. Aging, the Individual, and Society. Ninth edition. Belmont, California: Wadsworth/Cengage Learning, 2011.

Cita MLA (9th ed.)

Hillier, Susan M., i Georgia M. Barrow. Aging, the Individual, and Society. Ninth edition. Wadsworth/Cengage Learning, 2011.