edited by Jason L. Finkle and C. Alison McIntosh
Population Council, 1994
Buku Teks
UNSW
UNSW, 2000
Buku Teks
edited by Robert H. Beck
National Association of Social Workers, 1965
Buku Teks
Heraud, Brian J., author
Routledge & Kegan Paul , 1981
Buku Teks
Hill, Reuben, author
Univeresity of North Carolina Press , 1965
Buku Teks