Simons, Robert
Pearson Education , 2014
Buku Teks
Freeman, Edith M.
Sage Publications, 1993
Buku Teks
Simons, Robert
Upper Saddle River Prentice Hall 1999,
Buku Teks
Valiant, Carrie
American Hospital Association, 1996
Buku Teks
Smith, David R.
Van Nostrand Reinhold, 1993
Buku Teks