Stubbs, Michael
Blackwell, 1996
Buku Teks
Baka, Farida, author
Janus Publishing , 1988
Buku Teks
Rochemont, Michael S.
Cambridge University Press, 1993
Buku Teks
Chuang, Edward Chi-chang
Kanazawa Institute of Technology Press, 1981
Buku Referensi
Moon, Rousamund, author
Clarendon Press, 1998
Buku Teks