Retter, H. (2011). Spranger, Eduard. Religion Past and Present online. doi:10.1163/1877-5888_rpp_SIM_025690
Citazione stile Chigago Style (17a edizione)Retter, Hein. "Spranger, Eduard." Religion Past and Present Online 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_025690.
Citatione MLA (9a ed.)Retter, Hein. "Spranger, Eduard." Religion Past and Present Online, 2011, https://doi.org/10.1163/1877-5888_rpp_SIM_025690.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.
