Hardin, G. J. (1964). Population, evolution & birth control: A collage of controversial readings. W.H. Freeman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHardin, Garrett James. Population, Evolution & Birth Control: A Collage of Controversial Readings. San Francisco: W.H. Freeman, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHardin, Garrett James. Population, Evolution & Birth Control: A Collage of Controversial Readings. W.H. Freeman, 1964.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.