McCarthy, N.K.
McGraw-Hill, 2012
Buku Teks
Wallace, Michael
American Management Association, 2011
eBooks
U.S. Department of Health Human Services, 1988
Buku Teks
Levin, Richard B.
Osborne McGraw-Hill, 1990
Buku Referensi
Mortenson, Michael E.
Industrial Press, 1990
Buku Referensi