Παραπομπή APA

Singh, D., & Chaudhary, F. (1986). Theory and analysis of sample survey designs. New age International.

Παραπομπή Chicago Style

Singh, Daroga, και F.S Chaudhary. Theory and Analysis of Sample Survey Designs. New Delhi: New age International, 1986.

Παραπομπή MLA

Singh, Daroga, και F.S Chaudhary. Theory and Analysis of Sample Survey Designs. New age International, 1986.