APA (7th ed.) Citation

Ruppert, H. (2011). Bulgakov, Sergey Nikolayevich. Religion Past and Present online. doi:10.1163/1877-5888_rpp_SIM_02511

Chicago Style (17th ed.) Citation

Ruppert, Hans-Jürgen. "Bulgakov, Sergey Nikolayevich." Religion Past and Present Online 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_02511.

MLA (9th ed.) Citation

Ruppert, Hans-Jürgen. "Bulgakov, Sergey Nikolayevich." Religion Past and Present Online, 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_02511.

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