Buku Referensi
CHalker, Sylvia, author
Clarendon Press, 1994
Buku Referensi
Visser, Leontien E., author
Foris Publications, 1987
Buku Referensi
Shau, Wing Chan, author
Stanford University Press, 1946
Buku Referensi
Mansion, J.E., author
London Harrap 1972-1980
Buku Referensi