Kuhlen, R. G., & Thompson, G. G. (1970). Psychological studies of human development (3rd.ed.). Appleton-century-crofts.
Lua i Stíl Chicago (17ú heag.)Kuhlen, Raymond G., agus George G. Thompson. Psychological Studies of Human Development. 3rd.ed. New York: Appleton-century-crofts, 1970.
Lua MLA (9ú heag.)Kuhlen, Raymond G., agus George G. Thompson. Psychological Studies of Human Development. 3rd.ed. Appleton-century-crofts, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.