Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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