Cruz, C. J. (1973). Sampling studies in the survey of households in selected barrios in the Philippines [microform]. Photoduplication Service.
Chicago-referens (17:e uppl.)Cruz, Carmelita J. Sampling Studies in the Survey of Households in Selected Barrios in the Philippines [microform]. Quezon City: Photoduplication Service, 1973.
MLA-referens (9:e uppl.)Cruz, Carmelita J. Sampling Studies in the Survey of Households in Selected Barrios in the Philippines [microform]. Photoduplication Service, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.