APA استشهاد

India. Directorate of National Sample Survey. (1967). National sample survey no. 121, 18th round , preliminary estimates of birth and death rates and of the rate of growth of population. National Sample Survey Organisation.

استشهاد بنمط شيكاغو

India. Directorate of National Sample Survey. National Sample Survey No. 121, 18th Round , Preliminary Estimates of Birth and Death Rates and of the Rate of Growth of Population. Delhi: National Sample Survey Organisation, 1967.

MLA استشهاد

India. Directorate of National Sample Survey. National Sample Survey No. 121, 18th Round , Preliminary Estimates of Birth and Death Rates and of the Rate of Growth of Population. National Sample Survey Organisation, 1967.