Hoffman, W. Michael, author
McGraw-Hill, 1995
Buku Teks
Hoffman, W. Michael, author
New York, N.Y. , McGraw-Hill
Buku Teks
Donaldson, Thomas, author
Oxford University Press, 1989
Buku Teks
Teguh Pudjo Muljono
BPFE-Yogyakarta , 1996
Buku Teks
Welsch, Glenn A., author
Salemba Empat, 2000
Buku Teks