MADER, S. S. (2011). Inquiry into life. Mc Graw-Hill.
Lua i Stíl Chicago (17ú heag.)MADER, Sylvia S. Inquiry into Life. Mc Graw-Hill, 2011.
Lua MLA (9ú heag.)MADER, Sylvia S. Inquiry into Life. Mc Graw-Hill, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.