Simanungkalit, Susan H.
Universitas Indonesia, 1997
UI - Tesis (Membership)
Ahmad Fachry Falah
2019
UI - Skripsi (Membership)
Muller, Kal
Periplus , 1999
Buku Referensi
editors, Carl Edmonds, Michael Bennett, John lippmann, Simon J. Mitchell
CRC Press, 2016
Buku Teks
Tillman, Albert A.
W.C. Brown, 1966
Buku Teks