Haupt, Arthur, author
Population Reference Bureau, 1998
Buku Referensi
Population Reference Bureau, 2004
Multimedia
Kluwer Academic/Plenum, 2005
Buku Teks
Petersen, William, author
Macmillan, 1961
Buku Teks
Petersen, William, author
Macmillan, 1969
Buku Teks