Hardin, G. J. (1964). Population, evolution & birth control: A collage of controversial readings. W.H. Freeman.
Lua i Stíl Chicago (17ú heag.)Hardin, Garrett James. Population, Evolution & Birth Control: A Collage of Controversial Readings. San Francisco: W.H. Freeman, 1964.
Lua MLA (9ú heag.)Hardin, Garrett James. Population, Evolution & Birth Control: A Collage of Controversial Readings. W.H. Freeman, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.