Kers, Marijke
Bv Laren, 1984
Buku Referensi
Carroll, Burt Haring, 1896-
John Wiley & Sons, 1980
Buku Teks
Luciana, James
Rockport, 1999
Buku Teks
Imada Fatma
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2006
UI - Tesis Membership
Bureau of Immigration Research, 1990
Buku Teks