Queen's, 1970
Buku Teks
Kampuchea Inquiry Commission , 1982
Buku Teks
edited by Kusumanto Setyonegoro [and others]
Yayasan Dharma Graha, 1977
Buku Teks
Nyerere, Julius Kambarage
Oxford University Press, 1990
Buku Teks
Beckman, Harry
W.B. Saunders, 1961
Buku Teks