Bañez, J. E. (2013). Estimation under purposive sampling with auxiliary variable. Philippine Statistician.
Chicago Style (17. basım) AtıfBañez, John Erwin. "Estimation Under Purposive Sampling with Auxiliary Variable." Philippine Statistician 2013.
MLA (9th ed.) AtıfBañez, John Erwin. "Estimation Under Purposive Sampling with Auxiliary Variable." Philippine Statistician, 2013.
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