एपीए उद्धरण

Curtis, R. K. (1982). Evolution or extinction: The choice before us. Pergamon Press.

शिकागो स्टाइल उद्धरण

Curtis, Richard K. Evolution or Extinction: The Choice Before Us. Oxford: Pergamon Press, 1982.

एमएलए उद्धरण

Curtis, Richard K. Evolution or Extinction: The Choice Before Us. Pergamon Press, 1982.