Lua APA (7ú heag.)

Cochran, W. G. (1977). Sampling techniques (3d ed.). Wiley.

Lua i Stíl Chicago (17ú heag.)

Cochran, William Gemmell. Sampling Techniques. 3d ed. New York: Wiley, 1977.

Lua MLA (8ú heag.)

Cochran, William Gemmell. Sampling Techniques. 3d ed. Wiley, 1977.

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