[publisher not identified], [date of publication not identified]
Naskah
Linder, Jane C.
American Management Association, 2008
eBooks
Bradberry, John, 1961-
American Management Association, 2011
eBooks
Tulard, Jean
Methuen, 1985
Buku Teks SO
Solomon, R.J.
Hale & Iremonger, 1988
Buku Teks SO