Gunaratne, V.T. Herat
McGraw-Hill, 1980
Buku Teks
Gunaratne, V.T. Herat
Tata McGraw-Hill, 1977
Buku Teks
WHO, 1990
Buku Teks
edited by Michael H. Merson, Robert E. Black and Anne J. Mills
Aspen Publication, 2001
Buku Teks
Levine, Ruth, author
Jones and Bartlett Publishers , 2007
Buku Teks