Tohutoro APA (7th ed.)

Cockran,William G. (2015). Sampling Techniques, 3rd ed (3rd edition.). Wiley.

Tohutoru Kātū Chicago (17th ed.)

Cockran,William G. Sampling Techniques, 3rd Ed. 3rd edition. New York: Wiley, 2015.

Tohutoro MLA (9th ed.)

Cockran,William G. Sampling Techniques, 3rd Ed. 3rd edition. Wiley, 2015.