edited by Albert Newgardsen
American Management Association, 1959
Buku Teks
White, Rodney R., author
John Wiley & Sons, 1994
Buku Teks
Burke, Ronald S.
McGraw - Hill , 1981
Buku Teks
Jones, Gareth R., author
McGraw-Hill, 2007
Buku Teks
Synnott, William R.
John Wiley & Sons, 1981
Buku Teks