APA-Zitierstil (7. Ausg.)

Leedy, P. D., & Ormrod, J. E. (2005). Practical research: Planning and design (8th ed.). Prentice Hall.

Chicago-Zitierstil (17. Ausg.)

Leedy, Paul D., und Jeanne Ellis Ormrod. Practical Research: Planning and Design. 8th ed. Upper Saddle River, N.J.: Prentice Hall, 2005.

MLA-Zitierstil (8. Ausg.)

Leedy, Paul D., und Jeanne Ellis Ormrod. Practical Research: Planning and Design. 8th ed. Prentice Hall, 2005.