APA-viite

Burckhardt, T. (1976). An introduction to Sufi doctrine. Thorsons.

Chicago-tyylinen lähdeviittaus

Burckhardt, Titus. An Introduction to Sufi Doctrine. Wellingborough: Thorsons, 1976.

MLA-viite

Burckhardt, Titus. An Introduction to Sufi Doctrine. Thorsons, 1976.