Kappel, Frederick R., 1902-
McGraw - Hill , 1960
Buku Teks
Toffler, Alvin, author
Pantja Simpati, 1986
Buku Teks
Ford, Robert N.
American Management Association, 1969
Buku Teks
McNaughton, Wayne L. (Wayne Leslie), 1902-, author
Wiley, 1970
Buku Teks
Rasiel, Ethan M
McGraw-Hill, 1999
Buku Teks