Will, John W., author
Prentice-Hall, 2002
Buku Teks
Timberlake, Karen C., author
Pearson - Prentice Hall, 2009
Buku Teks
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