Robertson, R. (2001). Karl Beck: From Radicalism to Monarchism. Year Book / Leo Baeck Institute.
Citazione stile Chigago Style (17a edizione)Robertson, Ritchie. "Karl Beck: From Radicalism to Monarchism." Year Book / Leo Baeck Institute 2001.
Citatione MLA (8a ed.)Robertson, Ritchie. "Karl Beck: From Radicalism to Monarchism." Year Book / Leo Baeck Institute, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.