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Buku Teks
Arangio-Ruiz, Gaetano
Sijthoff & Noordhoff , 1979
Buku Teks
Cambridge : The President and Fellows of Harvard College
Majalah, Jurnal, Buletin
Fish, Donald
G.P. Putnam's Sons , 1962
Buku Teks
Tokyo : The Japan Institute of International Affairs
Majalah, Jurnal, Buletin