Reuter, E. B. (1923). Population problems. J.B. Lippincott Company.
Lua i Stíl Chicago (17ú heag.)Reuter, Edward Byron. Population Problems. Philadelphia, London [etc.]: J.B. Lippincott Company, 1923.
Lua MLA (8ú heag.)Reuter, Edward Byron. Population Problems. J.B. Lippincott Company, 1923.
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