Gray, Ann, author
Sage Publications, 2003
Buku Teks
Gray, Ann
SAGE Publications, Inc, 2011
Buku Teks
Grundy, F., author
World Health Organization , 1973
Buku Teks
Lodico, Marguerite G., author
Jossey-Bass, 2010
Buku Teks
Bailey, Susan, author
Jones & Bartlett Learning, 2013
Buku Teks