APA-Zitierstil (7. Ausg.)

Leedy, P. D. (1985). Practical research: Planning and design (3rd ed.). Macmillan.

Chicago-Zitierstil (17. Ausg.)

Leedy, Paul D. Practical Research: Planning and Design. 3rd ed. New York: Macmillan, 1985.

MLA-Zitierstil (9. Ausg.)

Leedy, Paul D. Practical Research: Planning and Design. 3rd ed. Macmillan, 1985.