APA-čujuhus (7. p.)
Wolff, E., & Versfeld, R. (2021). Martin Versfeld: A South African Philosopher in Dark Times. Project Muse.
Chicago-čujuhus (17. p.)
Wolff, Ernst, juo Ruth Versfeld. Martin Versfeld: A South African Philosopher in Dark Times. Baltimore, Maryland: Project Muse, 2021.
MLA-čujuhus (9. p.)
Wolff, Ernst, juo Ruth Versfeld. Martin Versfeld: A South African Philosopher in Dark Times. Project Muse, 2021.
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