APA (7th ed.) Citation

Innocent, I., Cheney, C. R. b., & Semple, W. H. (1953). Letters concerning England (1198-1216). T. Nelson & Sons.

Chicago Style (17th ed.) Citation

Innocent, III, C. R. b.1906 Cheney, and W. H. Semple. Letters Concerning England (1198-1216). London: T. Nelson & Sons, 1953.

MLA (9th ed.) Citation

Innocent, III, et al. Letters Concerning England (1198-1216). T. Nelson & Sons, 1953.

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