APA-čujuhus (7. p.)
(1991). The world factbook 1991 (ed.). Central Intelligence Agency.
Chicago-čujuhus (17. p.)
The World Factbook 1991. ed. Washington: Central Intelligence Agency, 1991.
MLA-čujuhus (9. p.)
The World Factbook 1991. ed. Central Intelligence Agency, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.