APA (7th ed.) Citation

Sumption. (1978). The Albigensian Crusade. Faber & Faber.

Chicago Style (17th ed.) Citation

Sumption. The Albigensian Crusade. London: Faber & Faber, 1978.

MLA (8th ed.) Citation

Sumption. The Albigensian Crusade. Faber & Faber, 1978.

Warning: These citations may not always be 100% accurate.