Gordon, Gill, author
International Planned Parenthood Federation , 1988
Buku Teks
Gordon, Gill, author
McMillan, 1994
Buku Referensi
Journal of Population, 11 (2) 2005 : 131-160, 2005
Artikel Jurnal
edited by Florence Haselkorn
Council on Social Work Education, 1971
Buku Teks
edited by Katherine A. Kendall
Council on Social Work Education, 1971
Buku Teks