Churniatun, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2004
UI - Tesis (Membership)
John Wiley & Sons, 1997
Buku Teks
Howlin, Patricia, author
John Wiley & Sons, 1999
Buku Referensi
Toth, Jennifer
A Touchstone Book , 1997
Buku Teks
Fisher, Dorothy Canfield
Whittlesey House McGraw-Hill Book Coy Inc, 1959
Buku Teks