Nichilson, Mary Jo
Prentice-Hall, 1997
Buku Teks
Litvak, Isaiah A., author
McGraw-Hill Ryerson, 1984
Buku Teks
Chatterjee, S.K., author
Martinus Nijhoff Publishers, 1981
Buku Teks
Griffin, Ricky W., author
Prentice-Hall, 2002
Buku Teks
Hill, Charles W. L., author
McGraw-Hill, 2012.
Buku Teks