Bañez, J. E. (2013). Estimation under purposive sampling with auxiliary variable. Philippine Statistician.
Chicago-referens (17:e uppl.)Bañez, John Erwin. "Estimation Under Purposive Sampling with Auxiliary Variable." Philippine Statistician 2013.
MLA-referens (9:e uppl.)Bañez, John Erwin. "Estimation Under Purposive Sampling with Auxiliary Variable." Philippine Statistician, 2013.
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