Citazione Stile APA (7a Edizione)

ProQuest (Firm), Knowles, D., Brooke, C. N. L., & London, V. C. M. (2001). 940-1216 (2nd ed.). Cambridge University Press.

Citazione stile Chigago Style (17a edizione)

ProQuest (Firm), David Knowles, Christopher Nugent Lawrence Brooke, e Vera C. M. London. 940-1216. 2nd ed. Cambridge: Cambridge University Press, 2001.

Citatione MLA (9a ed.)

ProQuest (Firm), et al. 940-1216. 2nd ed. Cambridge University Press, 2001.