Mader, S. S. (1988). Inquiry into life (5th.ed.). WCB.
Lua i Stíl Chicago (17ú heag.)Mader, Sylvia S. Inquiry into Life. 5th.ed. Iowa: WCB, 1988.
Lua MLA (9ú heag.)Mader, Sylvia S. Inquiry into Life. 5th.ed. WCB, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.