United Nations. (1964). Studie in long term eco. projections. U.N.
Chicago-čujuhus (17. p.)United Nations. Studie in Long Term Eco. Projections. New York: U.N, 1964.
MLA-čujuhus (9. p.)United Nations. Studie in Long Term Eco. Projections. U.N, 1964.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.