Ary, D., Jacobs, L. C., & Razavieh, A. (2002). Introduction to research in education (6th ed.). Wadsworth, Thomson Learning.
Citace podle Chicago (17th ed.)Ary, Donald, Lucy Cheser Jacobs, a Asghar Razavieh. Introduction to Research in Education. 6th ed. Australia: Wadsworth, Thomson Learning, 2002.
Citace podle MLA (9th ed.)Ary, Donald, et al. Introduction to Research in Education. 6th ed. Wadsworth, Thomson Learning, 2002.
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