Cochran, W. G. (1963). Sampling techniques (2a. ed.). John Wiley & Sons.
Cita Chicago (17th ed.)Cochran, William Gemmell. Sampling Techniques. 2a. ed. Nueva York: John Wiley & Sons, 1963.
Cita MLA (9th ed.)Cochran, William Gemmell. Sampling Techniques. 2a. ed. John Wiley & Sons, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.