Ahrens, C. Donald
Brooks/Cole, Cengage Learning, , 2011
Buku Teks
translated by Zhai Jiangyue
Guangxi University Press , 2005
Buku Teks
Republik Indonesia, 1994
Buku Referensi
Aguado, Edward
2001
Multimedia
Aguado, Edward
Prentice-Hall, 2001
Buku Teks