Ary, D., Jacobs, L. C., & Razavieh, A. (2002). Introduction to research in education (6th ed.). Wadsworth, Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Ary, Donald, Lucy Cheser Jacobs, agus Asghar Razavieh. Introduction to Research in Education. 6th ed. Australia: Wadsworth, Thomson Learning, 2002.
Lua MLA (9ú heag.)Ary, Donald, et al. Introduction to Research in Education. 6th ed. Wadsworth, Thomson Learning, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.