Huyck, M. H., & Hoyer, W. J. (1982). Adult development and aging. Wadsworth Wadsworth.
Lua i Stíl Chicago (17ú heag.)Huyck, Margaret H., agus William J. Hoyer. Adult Development and Aging. California: Wadsworth Wadsworth, 1982.
Lua MLA (9ú heag.)Huyck, Margaret H., agus William J. Hoyer. Adult Development and Aging. Wadsworth Wadsworth, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.