Bañez, J. E. (2013). Estimation under purposive sampling with auxiliary variable. Philippine Statistician.
Citazione stile Chigago Style (17a edizione)Bañez, John Erwin. "Estimation Under Purposive Sampling with Auxiliary Variable." Philippine Statistician 2013.
Citatione MLA (9a ed.)Bañez, John Erwin. "Estimation Under Purposive Sampling with Auxiliary Variable." Philippine Statistician, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.