APA (7th ed.) Citation

Leff, G. (1967). Heresy in the later middle ages.

Chicago Style (17th ed.) Citation

Leff, Gordon. Heresy in the Later Middle Ages. 1967.

MLA (9th ed.) Citation

Leff, Gordon. Heresy in the Later Middle Ages. 1967.

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