Cochran, W. G. (1977). Sampling Techniques (3rd ed.). Wiley.
Chicago Style (17th ed.) ZitazioaCochran, William G. Sampling Techniques. 3rd ed. New York: Wiley, 1977.
MLA (9th ed.) ZitazioaCochran, William G. Sampling Techniques. 3rd ed. Wiley, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.