Wappmann, V. (2011). Helmont. Religion Past and Present online. doi:10.1163/1877-5888_rpp_COM_09603
Citazione stile Chigago Style (17a edizione)Wappmann, Volker. "Helmont." Religion Past and Present Online 2011, https://doi.org/10.1163/1877-5888_rpp_COM_09603.
Citatione MLA (9a ed.)Wappmann, Volker. "Helmont." Religion Past and Present Online, 2011, https://doi.org/10.1163/1877-5888_rpp_COM_09603.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.
