Cita APA (7a ed.)
Leedy, P. D. (2005). Practical research: Planning and design (8th ed.). Pearson.
Cita Chicago Style (17a ed.)
Leedy, Paul D. Practical Research: Planning and Design. 8th ed. New Jersey : Upper Saddle River: Pearson, 2005.
Cita MLA (9a ed.)
Leedy, Paul D. Practical Research: Planning and Design. 8th ed. Pearson, 2005.
Precaución: Estas citas no son 100% exactas.