Artikel Jurnal
Al-Qaradhawi, Yusuf, author
Gema Insani Press, 1999
Buku Referensi
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Utrecht, Elien, author
Pustaka Tinta Mas, 1994
Buku Teks
Liu, Fuhua, author
Language and Culture University Press, 2009
Buku Teks