Meng, Peter Lai Hock, author
ISESAS, 2007
Buku Teks
Butterworth-Heinemann, 1993
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
edited by Greg N. Gregoriou
Academic Press, 2013
eBooks