Jordan, Jason, author
McGraw-Hill, 2012
Buku Teks
Simpkins, Robert A., author
[American Management Association, ], 2004
eBooks
Ades, Leslie J., author
McGraw-Hill, 1992
Buku Teks
Still, Richard R
Prentice Hall International, 1988
Buku Teks
Jones, John G., author
Alexander Hamilton Institute, 1961
Buku Teks