Woodward, Ralph Lee, author
Central America: a nation divided
Oxford University Press , 1985
 Buku Referensi
Liman, Yakub, author
Astra: on becoming pride of the nation
Gramedia Pustaka Utama, 2017
 Buku Teks
Nuclear standoff,the nation,and the alliance
 Artikel Jurnal
Liman, Yakub, author
Astra: on becoming pride of the nation
Gramedia Pustaka Utama, 2017
 Buku Teks
Duchacek, Ivo D., author
Conflict and cooperation among nation
Holt, Rinehart and Winston, 1965
 Buku Teks
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