Goldstein, Beth
McGraw-Hill , 2007
Multimedia
Thaler, Malcom S.
Penerbit Buku Kedokteran EGC, 2016
Buku Teks
Christensen, Mary, 1951-
American Management Association, 2007
eBooks
Waterworth, Derek
Basingstoke Macmillan ., 1987
Buku Teks
A & C Black Publishers, 2006
Buku Referensi