Niebergall, F. (1909). Küssner, Gustav, Was ist Christentum?: [Rezension]. Theologische Literaturzeitung, 34(24), 667-669.
Citazione stile Chigago Style (17a edizione)Niebergall, Friedrich. "Küssner, Gustav, Was Ist Christentum?: [Rezension]." Theologische Literaturzeitung 34, no. 24 (1909): 667-669.
Citatione MLA (9a ed.)Niebergall, Friedrich. "Küssner, Gustav, Was Ist Christentum?: [Rezension]." Theologische Literaturzeitung, vol. 34, no. 24, 1909, pp. 667-669.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.
