Sigelman, C. K., & Rider, E. A. (2003). Life-span human development (4th ed.). Thomson/Wadsworth.
Lua i Stíl Chicago (17ú heag.)Sigelman, Carol K., agus Elizabeth A. Rider. Life-span Human Development. 4th ed. Australia: Thomson/Wadsworth, 2003.
Lua MLA (9ú heag.)Sigelman, Carol K., agus Elizabeth A. Rider. Life-span Human Development. 4th ed. Thomson/Wadsworth, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.