Philippatos, George C.
Allyn and Bacon , 1991
Buku Teks
Keller, I. Wayne
McGraw-Hill, 1966
Buku Teks
Carter, William K., 1951-, author
Dame/Thomson Learning, 2002
Buku Teks
Hammer, Lawrence H., author
South-Western, 1993
Buku Teks
Moriarity, Shane, author
John Wiley & Sons, 1991
Buku Teks