Haley, George T.
Butterworth-Heinemann , 1999
Buku Teks
Beamish, Paul W., 1953-, author
Irwin, 1997
Buku Teks
Flaherty, M. Therese, author
McGraw-Hill, 1996
Buku Teks
edited by Chris Rowley; Malcolm Warner
Routledge, 2007
Buku Teks
Hodgetts, Richard M., author
Irwin McGraw-Hill, 200
Buku Teks