Bridson, Gavin D.R.
Gerland Publishing, Inc., 1994
Buku Teks
Kemp, Herman C.
KITLV Press, 1990
Buku Referensi
Alexander-Frutschi
Stanford Research Institute, 1963
Buku Teks
Groenendael, Victoria M. Clara van
Foris Publications, 1987
Buku Referensi
Freedman, Ronald
Irvington, 1975
Buku Teks