Columbia subject headings:
Islam--Controversial literature.
Islam--Doctrines.
Islamic law.
Qurʼan.
Sunna.
Harvard subject headings:
Islam--Controversial literature
Islam--Doctrines
Islamic law
Qurʼan
Sunna
Princeton subject headings:
Faith and reason--Islam.
Islam--Doctrines.
Islamic heresies.
Islamic law--Interpretation and construction.
Islamic philosophy.
Offenses against religion--Islamic countries.
Sunna.
Takfīr (Islam)