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R. Chartterjee, 1932
Buku Teks
Williams, Joanna, author
Prafulla, 2005
Buku Teks
Yu, Mingguang, author
Yuelu Publishing House, 2006
Buku Teks
Agoes Ariesmunandar ; Davison, Julian ; Bromer, Bea ; Durmacay, Jacques
Archipelago Press, 1998
Buku Referensi
Sinaga, Bonatua Mangaraja, author
Universitas Indonesia, 2010
UI - Tesis (Open)