Enger, Eldon D., author
McGraw-HIll, 2003
Buku Teks
Vodopich, Darrell S., author
McGraw-Hill, 2008
Buku Teks
Scheinfein, Michael, author
Kendall/Hunt, 1993
Buku Teks
Jurch, George R., author
Burgess, 1975
Buku Teks
Duff, Michael F., author
Burgess, 1973
Buku Teks