Chowdhury, P. N. (1973). Economics of research & development. People's Pub. House.
Chicago-referens (17:e uppl.)Chowdhury, P. N. Economics of Research & Development. New Delhi: People's Pub. House, 1973.
MLA-referens (8:e uppl.)Chowdhury, P. N. Economics of Research & Development. People's Pub. House, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.