Tohutoro APA (7th ed.)

Cochran, W. G. (1963). Sampling techniques (2a. ed.). John Wiley & Sons.

Tohutoru Kātū Chicago (17th ed.)

Cochran, William Gemmell. Sampling Techniques. 2a. ed. Nueva York: John Wiley & Sons, 1963.

Tohutoro MLA (9th ed.)

Cochran, William Gemmell. Sampling Techniques. 2a. ed. John Wiley & Sons, 1963.