APA (7th ed.) Citation

Leedy, P. D. (1989). Practical research: Planning and design (4. ed.). Macmillan u.a.

Chicago Style (17th ed.) Citation

Leedy, Paul D. Practical Research: Planning and Design. 4. ed. New York u.a: Macmillan u.a, 1989.

MLA (9th ed.) Citation

Leedy, Paul D. Practical Research: Planning and Design. 4. ed. Macmillan u.a, 1989.