Clewer, Ann, author
Pearson Education, 1998
Buku Teks
World Health Organization
World Health Organization, 1990
Buku Teks
edited by George F. Wieland
Health Administration Press, 1981
Buku Teks
Ozcan, Yasar A., author
Jossey- Bass, 2009
Buku Teks
Finkler, Steven A., author
Jones and Bartlett, 2013
Buku Teks