Humi, Mayer, author
Pros-Kent, 1992
Buku Teks
Haberman, Richard, author
Pearson Prentice Hall, 2004
Buku Teks
Zill, Dennis G., author
Brooks/Cole & Cengage Learning, 2013
Buku Teks
Longman Scientific & Technical, 1991
Buku Teks
Boyce, William E., author
John Wiley & Sons, 1977
Buku Teks