Ahrens, C. Donald, author
Brooks/Cole, Cengage Learning, , 2011
Buku Teks
Ahrens, C. Donald, author
Brooks/Cole Cengage Learning, 2011
Buku Teks
Aguado, Edward
2001
Multimedia
Aguado, Edward, author
Prentice-Hall, 2001
Buku Teks
Republik Indonesia, 1994
Buku Referensi