APA-čujuhus (7. p.)
(1992). The world factbook 1992 (ed.). Central intelligence agency.
Chicago-čujuhus (17. p.)
The World Factbook 1992. ed. Washington: Central intelligence agency, 1992.
MLA-čujuhus (9. p.)
The World Factbook 1992. ed. Central intelligence agency, 1992.
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