Malthus, T. (1960). On population: Three essays. The new American library.
Chicago-čujuhus (17. p.)Malthus, Thomas. On Population: Three Essays. New York: The new American library, 1960.
MLA-čujuhus (9. p.)Malthus, Thomas. On Population: Three Essays. The new American library, 1960.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.