Corwin, Charles H., author
Prentice-Hall, 2001
Buku Teks
Anderson, Curtis B., author
Kendall/Hunt, 1990
Buku Teks
Boschmann, Erwin, author
McGraw-Hill, 1990
Buku Teks
John Wiley & Sons, 1980
Buku Teks
Holum, John R., author
John Wiley & Sons, 1982
Buku Teks