Martindell, Jackson
Harper & Row Publishers, 1962
Buku Teks
edited by Albert Newgardsen
American Management Association, 1958
Buku Teks
Uris, Auren, author
McGraw-Hill , 1957
Buku Teks
by the editors of Fortune
Doubleday, 1956
Buku Teks
Bower, Marvin
Massachutts Harvard University Press , 1949
Buku Teks