Cita APA (7a ed.)

Berkhout, C. T., & Russell, J. B. (1981). Medieval heresies: A bibliography, 1960-1979. Pontifical Institute of Mediaeval Studies.

Cita Chicago Style (17a ed.)

Berkhout, Carl T., y Jeffrey Burton Russell. Medieval Heresies: A Bibliography, 1960-1979. Toronto: Pontifical Institute of Mediaeval Studies, 1981.

Cita MLA (9a ed.)

Berkhout, Carl T., y Jeffrey Burton Russell. Medieval Heresies: A Bibliography, 1960-1979. Pontifical Institute of Mediaeval Studies, 1981.