Singh, D., & Chaudhary, F. (1986). Theory and analysis of sample survey designs. New age International.
استشهاد بنمط شيكاغوSingh, Daroga, و F.S Chaudhary. Theory and Analysis of Sample Survey Designs. New Delhi: New age International, 1986.
MLA استشهادSingh, Daroga, و F.S Chaudhary. Theory and Analysis of Sample Survey Designs. New age International, 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.