APA (7th ed.) Citation

Clarke, P. D., & Duggan, A. J. (2012). Pope Alexander III (1159-81): The art of survival. Ashgate.

Chicago Style (17th ed.) Citation

Clarke, Peter D., and Anne J. Duggan. Pope Alexander III (1159-81): The Art of Survival. Farnham (England) ; Burlington (USA): Ashgate, 2012.

MLA (9th ed.) Citation

Clarke, Peter D., and Anne J. Duggan. Pope Alexander III (1159-81): The Art of Survival. Ashgate, 2012.