edited by Chris Reed
Oxford University Press, 2017
Buku Teks
Bainbridge, David I., author
Pitman , 1993
Buku Teks
Bainbridge, David I., author
Pitman, 1993
Buku Teks
Bigelow, Robert P., author
Upper Saddle River, NJ: Prentice Hall, 1975,
Buku Referensi
Gemignani, Michael C., author
CBI Publishing , 1981
Buku Teks