Schmidt, T. (2011). Callistus II, Pope. Religion Past and Present online. doi:10.1163/1877-5888_rpp_SIM_02692
Style de citation Chicago (17e éd.)Schmidt, Tilmann. "Callistus II, Pope." Religion Past and Present Online 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_02692.
Style de citation MLA (8e éd.)Schmidt, Tilmann. "Callistus II, Pope." Religion Past and Present Online, 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_02692.
Attention : ces citations peuvent ne pas être correctes à 100%.