APA (7th ed.) Citation

Collins, R. (2012). Caliphs and kings: Spain, 796-1031 (1st published.). Wiley-Blackwell.

Chicago Style (17th ed.) Citation

Collins, Roger. Caliphs and Kings: Spain, 796-1031. 1st published. Malden (Massachusetts) [etc.]: Wiley-Blackwell, 2012.

MLA (9th ed.) Citation

Collins, Roger. Caliphs and Kings: Spain, 796-1031. 1st published. Wiley-Blackwell, 2012.