Lua APA (7ú heag.)

Cochran, W. G. (2009). Sampling Techniques (3rd edn.). Wiley Eastern.

Lua i Stíl Chicago (17ú heag.)

Cochran, William G. Sampling Techniques. 3rd edn. New Dehli: Wiley Eastern, 2009.

Lua MLA (9ú heag.)

Cochran, William G. Sampling Techniques. 3rd edn. Wiley Eastern, 2009.

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