Meng, Peter Lai Hock, author
ISESAS, 2007
Buku Teks
Butterworth-Heinemann, 1993
Buku Teks
Callahan, Robert E., author
Charles E. Merrill, 1988
Buku Teks
Shepherd, Elizabeth J., 1960-, author
Facet Publishing, 2003
Buku Referensi
United States of American Department of health Education and Welfare
US. Department of Health, 1976
Buku Teks