APA (7th ed.) Citation

Markschies, C. J. (2011). Ptolemy the Gnostic. Religion Past and Present online. doi:10.1163/1877-5888_rpp_SIM_124506

Chicago Style (17th ed.) Citation

Markschies, Christoph Johannes. "Ptolemy the Gnostic." Religion Past and Present Online 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_124506.

MLA (8th ed.) Citation

Markschies, Christoph Johannes. "Ptolemy the Gnostic." Religion Past and Present Online, 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_124506.

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