Verduin, J. R., & McEwen, D. N. (1984). Adults and their leisure: The need for lifelong learning. C.C. Thomas.
Lua i Stíl Chicago (17ú heag.)Verduin, John R., agus Douglas N. McEwen. Adults and Their Leisure: The Need for Lifelong Learning. Springfield, Ill: C.C. Thomas, 1984.
Lua MLA (9ú heag.)Verduin, John R., agus Douglas N. McEwen. Adults and Their Leisure: The Need for Lifelong Learning. C.C. Thomas, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.