APA引文

Singh, R. R. (1971). Labour economics. Sri Ram Mehra and company.

Chicago Edition Citation

Singh, R R. Labour Economics. Agra: Sri Ram Mehra and company, 1971.

MLA引文

Singh, R R. Labour Economics. Sri Ram Mehra and company, 1971.

警告：這些引文格式不一定是100％准確.