Tohutoro APA (7th ed.)
(1989). The world factbook 1989 (ed.). Central Intelligence Agency.
Tohutoru Kātū Chicago (17th ed.)
The World Factbook 1989. ed. Washington: Central Intelligence Agency, 1989.
Tohutoro MLA (9th ed.)
The World Factbook 1989. ed. Central Intelligence Agency, 1989.
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