Ormerod, Paul, author
Gramedia , 1999
Buku Teks
Maria Farida Indrati, author
Kanisius, 2007
Buku Teks
The New Zealand Education Canter, [date of publication not identified]
Buku Referensi
Adeksi, 2004
Buku Teks
Lina Miftahul Jannah, author
FISIP UI, 2014
UI - Makalah dan Kertas Kerja