Milkovich, George T., author
McGraw-Hill, 1999
Buku Teks
Newman, Donald J.
Little, Brown & Co., 1966
Buku Teks
Newman, Peter C.
McClelland and Stewart, 1978
Buku Teks
Anderson, Patrick R.
McGraw-Hill , 1993
Buku Teks
Newman, Donald G.
John Wiley & Sons, 1978
Buku Teks