APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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