Reinecke, Ian
Mcphee Gribble Publishers, 1985
Buku Teks
Zichy, Shoya, author
American Management Association, 2007
eBooks
John Macbeath, Neil Dempster
Routledge, 2009
Buku Teks
Kulacz, Robert
[publisher not identified], 2002
Buku Teks
Myrick, Florence, author
Lippincott Williams & Wilkins, 2005
Buku Teks