Wattenberg, Ben J
Doubleday, 1974
Buku Teks
Garte, Seymour, author
American Management Association, 2008
eBooks
Fersh, Seymour H., author
Public Affairs, 1961
Buku Teks
edited by Jeremy Richardson
Rontledge, 1996
Buku Teks
Williams, Robin M., author
Alfred A. Knopf, 1966
Buku Teks