Michaud, E., & Marschall, J. (1897). Was der Altkatholicismus erreicht hat. [publisher not identified].
Citazione stile Chigago Style (17a edizione)Michaud, Eugène, e Johann Marschall. Was Der Altkatholicismus Erreicht Hat. Bonn: [publisher not identified], 1897.
Citatione MLA (8a ed.)Michaud, Eugène, e Johann Marschall. Was Der Altkatholicismus Erreicht Hat. [publisher not identified], 1897.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.