Nelson, Gideon E.
Buku Teks
Tamarin, Robert H., author
McGraw-HIll, 2002
Buku Teks
Gup, Benton E., author
John Wiley & Sons, 1987
Buku Teks
Holum, John R., author
John Wiley & Sons, 1982
Buku Teks
Papell, David H., author
Houghton Mifflin, 2001
Buku Teks