Cavanaugh, J. C., & Blanchard-Fields, F. (2015). Adult development and aging (7th edition.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Cavanaugh, John C., agus Fredda Blanchard-Fields. Adult Development and Aging. 7th edition. Stamford, CT: Cengage Learning, 2015.
Lua MLA (9ú heag.)Cavanaugh, John C., agus Fredda Blanchard-Fields. Adult Development and Aging. 7th edition. Cengage Learning, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.