APA-viite (7. p.)

Kessler, M. Between History and Futurology: Ossip K. Flechtheim / Mario Kessler. German scholars in exile : new studies in intellectual history.

Chicago-viite (17. p.)

Kessler, Mario. "Between History and Futurology: Ossip K. Flechtheim / Mario Kessler." German Scholars in Exile : New Studies in Intellectual History .

MLA-viite (8. p.)

Kessler, Mario. "Between History and Futurology: Ossip K. Flechtheim / Mario Kessler." German Scholars in Exile : New Studies in Intellectual History, .