Cavanaugh, J. C., & Blanchard-Fields, F. (2011). Adult development and aging (6th ed.). Wadsworth/Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Cavanaugh, John C., agus Fredda Blanchard-Fields. Adult Development and Aging. 6th ed. Australia: Wadsworth/Cengage Learning, 2011.
Lua MLA (9ú heag.)Cavanaugh, John C., agus Fredda Blanchard-Fields. Adult Development and Aging. 6th ed. Wadsworth/Cengage Learning, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.