COCHRAN, W. G. (1963). Sampling techniques; 2nd ed (2nd ed.). John wiley.
Chicago Style (17th ed.) ZitazioaCOCHRAN, William G. Sampling Techniques; 2nd Ed. 2nd ed. New York: John wiley, 1963.
MLA (9th ed.) ZitazioaCOCHRAN, William G. Sampling Techniques; 2nd Ed. 2nd ed. John wiley, 1963.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.