McDonough, Carol
Addison-Wesley, 1985
Buku Teks
Tillery, Bill W., author
McGraw-Hill, 2008
Buku Teks
Anton, Howard, author
John Wiley & Sons, 1984
Buku Teks
Christian, Gary D., author
John Wiley & Sons, 1980
Buku Teks
Holman, J.P. (Jack Philip), author
McGraw-Hill, 1997
Buku Referensi