Thompson, W. S. (1935). Population problems (2d ed.). McGraw-Hill Book Company, inc..
Lua i Stíl Chicago (17ú heag.)Thompson, Warren Simpson. Population Problems. 2d ed. New York, London: McGraw-Hill Book Company, inc., 1935.
Lua MLA (8ú heag.)Thompson, Warren Simpson. Population Problems. 2d ed. McGraw-Hill Book Company, inc., 1935.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.