Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.