एपीए उद्धरण

Chowdhury, P. (1973). Economics of research and development. People.

शिकागो स्टाइल उद्धरण

Chowdhury, P.N. Economics of Research and Development. Delhi: People, 1973.

एमएलए उद्धरण

Chowdhury, P.N. Economics of Research and Development. People, 1973.