World Health Organization, 1983
Buku Teks
Sheridan, Charles L.
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Buku Teks
DiMatteo, M. Robin, author
Allyn and Bacon, 2002
Buku Teks
Christman, Luther P., author
Westview Press, 1981
Buku Teks
Regula H. Robnett , Walter C. Chop, edited
Jones and Bartlett Learning, 2015
Buku Teks