Crane, Burton
Simon and Schuster , 1959
Buku Teks
Schabacker, R. W. (Richard Wallace), 1899-1935, author
Financial Times Management, 1994
Buku Teks
Crane, Burton
Harcourt, Brace and Company, 1956
Buku Teks
Kamm, Jacob O.
World Publishing Comp., 1952
Buku Teks
Sokoloff, Kiril, author
McGraw-Hill/Irwin, 1984
Buku Teks