Hill, John W., author
Prentice-Hall, 1993
Buku Teks
Holum, John R., author
John Wiley & Sons, 1987
Buku Teks
Holum, John R., author
John Wiley & Sons, 1995
Buku Teks
Timm, John Arrend
McGraw-Hill, 1966
Buku Teks
Seager, Spencer L., author
St. Paul West Publishing, 1994
Buku Teks