Holl, Steven, author
William Stout, 2006
Buku Teks
Mitchell, Thomas G., author
Longmans, Green, 1892
Buku Teks
editor Haryati Soebadio
Archipelago Press, 1998
Buku Teks SO
Agoes Ariesmunandar ; Davison, Julian ; Bromer, Bea ; Durmacay, Jacques
Archipelago Press, 1998
Buku Referensi
United Nations , 1987
Buku Teks