APA (7th ed.) Citation

Lomax, J. P. I. (1987). Ingratus or indignus: Canonistic argument in the conflict between Pope Gregory IX and Emperor Frederick II.

Chicago Style (17th ed.) Citation

Lomax, John Phillip II. Ingratus or Indignus: Canonistic Argument in the Conflict Between Pope Gregory IX and Emperor Frederick II. 1987.

MLA (9th ed.) Citation

Lomax, John Phillip II. Ingratus or Indignus: Canonistic Argument in the Conflict Between Pope Gregory IX and Emperor Frederick II. 1987.

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