21
22
by Fishman, Ted C, 1958-
Published 2005
23
by Cheng, Li, 1956-
Published 1997
24
by Kotler, Philip
Published 2000
25
Published 1994
26
27
Published 1984
28
by Sen, Amartya Kumar
Published 1999
29
by Romney, Mitt.
Published 2011
30
by Figgie, Harry E.
Published 1993
31
Published 1994
32
Published 1993
33
Published 2004
34
by Fetter, Bruce
Published 1983
35
Published 1991
36
by Das, Dilip K, 1945-
Published 1993
37
by Gore, Lance L. P, 1958-
Published 1998
38
by Hashim Wan Teh, Wan, 1949-
Published 1999
39
Published 2003
40
by Kerblay, Basile H.
Published 1983