Henslin, James M., author
Pearson , 2008
Buku Teks
Charon, Joel M., author
Allyn and Bacon, 1992
Buku Teks
Mann, Peter H., author
Humanities Press, 1965
Buku Teks
Anton, Howard, author
John Wiley & Sons, 1984
Buku Teks
Shani, Abraham B, author
McGraw-Hill, 2005
Buku Teks