APA-Zitierstil (7. Ausg.)

Leedy, P. D., & Ormrod, J. E. (2010). Practical research: Planning and design (9th ed., international ed.). Pearson Education Internat.

Chicago-Zitierstil (17. Ausg.)

Leedy, Paul D., und Jeanne Ellis Ormrod. Practical Research: Planning and Design. 9th ed., international ed. Boston: Pearson Education Internat, 2010.

MLA-Zitierstil (9. Ausg.)

Leedy, Paul D., und Jeanne Ellis Ormrod. Practical Research: Planning and Design. 9th ed., international ed. Pearson Education Internat, 2010.