Dyfyniad APA

Beltran, D. G. (1973). A method of determining economical sample size for sample surveys [microform]. Photoduplication Service.

Dyfyniad Arddull Chicago

Beltran, Disodado G. A Method of Determining Economical Sample Size for Sample Surveys [microform]. Quezon City: Photoduplication Service, 1973.

Dyfyniad MLA

Beltran, Disodado G. A Method of Determining Economical Sample Size for Sample Surveys [microform]. Photoduplication Service, 1973.

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