Ilmu fiqh dan ushul fiqh
Ar-Risalah
The Principles of Islamic jurisprudence : according to the Hanafi, Maliki, Shafi'i and Hambali schools / Abdur Rahim.
Islamic jurispurdence / Kemal A. Faruki
Alijtihad wa altaqlid wa al itba` wa al nadlor / Yahya Muhammad