Cita APA (7a ed.)

Inocencio III, P., Cheney, M. G., & Cheney, C. R. (1967). The letters of Pope Innocent III (1198-1216) concerning England and Wales: A calendar with an appendix of text. At the Clarendon Press.

Cita Chicago Style (17a ed.)

Inocencio III, Papa, Mary G. Cheney, y Christopher Robert Cheney. The Letters of Pope Innocent III (1198-1216) Concerning England and Wales: A Calendar with an Appendix of Text. Oxford: At the Clarendon Press, 1967.

Cita MLA (9a ed.)

Inocencio III, Papa, et al. The Letters of Pope Innocent III (1198-1216) Concerning England and Wales: A Calendar with an Appendix of Text. At the Clarendon Press, 1967.