Thompson, Laurence C
University of Washinton, 1967
Buku Teks
Nguyen, Dinh-Hoa, author
Charles E. Tuttle Co., 1991
Buku Referensi
Poole, Peter A.
Cornell University Press, 1970
Buku Teks
Phan Bich Nga, author
2003
UI - Tesis (Membership)
Hansel, Johannes
Erich Schmidt Verlag, 1965
Buku Referensi