Hitchcock, Terrance S.
Dow Jones-Irwin , 1982
Buku Teks
Hira, Ron, author
[American Management Association;, ], 2005
eBooks
Downs, Frederick
W.W. Norton & Company, 1991
Buku Teks
Weingast, David E.
Julian Messner,Inc., 1962
Buku Teks
Doxiadis, C. A.
Tata McGraw-Hill, 1976
Buku Teks