Waston, Donald
New York: McGraw-Hill, 1983
Buku Teks
Mehrotra, Chandra Mohan, author
Sage Publications, 2001
Buku Teks
Senn, James A.
Prentice-Hall, 1998
Buku Teks
edited by Michel Alexandre Cardin, Daniel Hastings, Peter Jackson, Daniel Krob, Pao Chuen Lui, Gerhard Schmitt
Springer Nature, 2019
eBooks
Lippeveld, Theo, author
World Health Organization, 2000
Buku Teks