Kerr, Thomas S., author
John Wiley & Sons, 1952
Buku Teks
Anderson, Ronald A., author
South-Western Publishing, 1975
Buku Teks
Epstein, David G., author
West Pub. Co, 1988.
Buku Teks
Donnell, John D., author
Richard D. Irwin, 1983
Buku Teks
Barnes, A. James, author
Richard D. Irwin , 1978
Buku Teks