Brown, L. R. (1981). World food resources and population: The narrowing margin. Population Reference Bureau.
Citazione stile Chigago Style (17a edizione)Brown, Lester R. World Food Resources and Population: The Narrowing Margin. Washington: Population Reference Bureau, 1981.
Citatione MLA (9a ed.)Brown, Lester R. World Food Resources and Population: The Narrowing Margin. Population Reference Bureau, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.