Swayne, Linda E.
Irwin, 1996
Buku Teks SO
Robinson, Kate
Butterworth-Heinemann, 1998
Buku Teks SO
Cronin, Patricia
Mosby , 2004
Buku Teks SO
Brigham, Eugene F., 1930-
The Dryden Press, 1991
Buku Teks
Brigham, Eugene F., 1930-
South-Western, 2008
Buku Teks