Cita APA

Leedy, P. D., & Ormrod, J. E. (2016). Practical research: Planning and design (Eleventh edition.). Pearson.

Citación estilo Chicago

Leedy, Paul D., and Jeanne Ellis Ormrod. Practical Research: Planning and Design. Eleventh edition. Boston: Pearson, 2016.

Cita MLA

Leedy, Paul D., and Jeanne Ellis Ormrod. Practical Research: Planning and Design. Eleventh edition. Pearson, 2016.