Columbia subject headings:
Ideology--Religious aspects--Islam.
Islamic fundamentalism.
Jihad.
Radicalism--Religious aspects--Islam.
Salafīyah.
Terrorism--Religious aspects--Islam.
Harvard subject headings:
Ideology--Religious aspects--Islam
Islamic fundamentalism
Jihad
Radicalism--Religious aspects--Islam
Salafīyah.
Terrorism--Religious aspects--Islam
Princeton subject headings:
Ideology--Religious aspects--Islam.
Islamic fundamentalism.
Jihad.
Radicalism--Religious aspects--Islam.
Terrorism--Religious aspects--Islam.