1
by Krugman, Paul R.
Published 2005
2
by Husted, Steven L.
Published 2007
3
by Madura, Jeff
Published 1989
4
Published 2004
5
by Mann, Richard
Published 1998
6
by Gandolfo, Giancarlo
Published 2002
7
by Vreeland, James Raymond, 1971-
Published 2006
8
by Gough, Leo
Published 1998
9
10
by Montes, Manuel F.
Published 1999
11
Published 2000
12
Published 1993
13
Published 1999
14
Published 1999
15
Published 1999
16
Published 1999
17
by Mohamed Ariff, 1942-
Published 2005
18
Published 2002
19
Published 2001
20
Published 2002