Dignen, Bob
York Associates, 1999
Buku Teks
Gurtu, Madhu
Munshiram Manoharlal, 1992
Buku Teks
Chu-Ren Huang, Dingxu Shi, editors
Cambridge University Press, 2016
Buku Teks
Kaplan, Jeffrey P., author
Prentice Hall International, 1995
Buku Teks
Makkink, H.J., author
Nijgh and Van Ditmar, 1951
Buku Teks