Borg, W. R., & Gall, M. D. (1983). Educational research: An introduction (4th ed.). Longman.
Cita Chicago Style (17a ed.)Borg, Walter R., y Meredith D. Gall. Educational Research: An Introduction. 4th ed. New York: Longman, 1983.
Cita MLA (8a ed.)Borg, Walter R., y Meredith D. Gall. Educational Research: An Introduction. 4th ed. Longman, 1983.
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