Leedy, P., & Ormrod, J. E. (2010). Practical research: Planning and design (9th ed.). Pearson Education International.
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Citación estilo Chicago
Leedy, Paul, and Jeanne Ellis Ormrod. Practical Research: Planning and Design. 9th ed. Upper saddle river, New Jersey: Pearson Education International, 2010.
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Cita MLA
Leedy, Paul, and Jeanne Ellis Ormrod. Practical Research: Planning and Design. 9th ed. Pearson Education International, 2010.
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