U.S Dep.t of Commerce, 1974
Buku Teks
Ferrari, Domenico, author
Prentice-Hall, 1978
Buku Teks
Lizy Kurian John; Lieven Eeckhout
Boca Raton, 2006
Buku Teks
Hollister, Robinson, author
Paris , Organization for Economic Co-operation and Development
Buku Teks
Arthur, Diane, author
American Management Association, 2008
eBooks