APA引文

India. Directorate of National Sample Survey. (1971). National sample survey no. 181, 21st round tables with notes on urban labour force. National Sample Survey Organisation.

Chicago Edition Citation

India. Directorate of National Sample Survey. National Sample Survey No. 181, 21st Round Tables with Notes on Urban Labour Force. Delhi: National Sample Survey Organisation, 1971.

MLA引文

India. Directorate of National Sample Survey. National Sample Survey No. 181, 21st Round Tables with Notes on Urban Labour Force. National Sample Survey Organisation, 1971.