एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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