Livi Bacci, M., & Ipsen, C. (1992). A concise history of world population. Blackwell.
Lua i Stíl Chicago (17ú heag.)Livi Bacci, Massimo, agus Carl Ipsen. A Concise History of World Population. Cambridge, MA: Blackwell, 1992.
Lua MLA (9ú heag.)Livi Bacci, Massimo, agus Carl Ipsen. A Concise History of World Population. Blackwell, 1992.
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