Berkowitz, Eric N.
St. Louis, Times Mirror/Mosby College Pub
Buku Teks
McGraw-Hill, 2002
Buku Teks
Hillestad, Steven G.
An Aspen Publication, 1991
Buku Teks
Ryan, William T.
Dew Jones Irwin, 1980
Buku Teks
Ryan, William T.
Richard D. Irwin, 1981
Buku Teks