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Rutland Charles E Tuttle 1959
Buku Teks
Sahulata, ZSA
Jakarta : Grasindo, 1992
Buku Teks
Departemen Pendidikan dan Kebudayaan, 1985
Buku Teks
Marwan Batubara
IRESS (Indonesian Resources Studies), 2011
Buku Teks
R Kristiawan, author
2012
UI - Tesis (Open)