Ary, D., Jacobs, L. C., & Razavieh, A. (2002). Introduction to research in education (6th ed.). Wadsworth, Thomson Learning.
Citazione stile Chigago Style (17a edizione)Ary, Donald, Lucy Cheser Jacobs, e Asghar Razavieh. Introduction to Research in Education. 6th ed. Australia: Wadsworth, Thomson Learning, 2002.
Citatione MLA (9a ed.)Ary, Donald, et al. Introduction to Research in Education. 6th ed. Wadsworth, Thomson Learning, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.