APA استشهاد

Cochran, W. G. (1977). Sampling techniques (2nd. ed.). Wiley Eastern.

استشهاد بنمط شيكاغو

Cochran, William G. Sampling Techniques. 2nd. ed. Bangalore: Wiley Eastern, 1977.

MLA استشهاد

Cochran, William G. Sampling Techniques. 2nd. ed. Wiley Eastern, 1977.