Journal of Population, 10 ( 2) 2004 : 79-88, 2004
Artikel Jurnal
Sussman, Ann, author
Routledge, 2015
Buku Teks
Artikel Jurnal
Ward, Brian, 1972-, author
No Starch Press, 2015
Buku Teks
edited by David Collier
Princeton University Press, 1979
Buku Teks