APA stil citiranja
Augustinus, A., & Perl, K. J. (1961). Freie Wille: Freie Wille. Paderborn: F. Schoeningh.
Chicago stil citiranjaAugustinus, Aurelius, and Karl Johann Perl. Freie Wille: Freie Wille. Paderborn: F. Schoeningh, 1961.
MLA stil citiranjaAugustinus, Aurelius, and Karl Johann Perl. Freie Wille: Freie Wille. Paderborn: F. Schoeningh, 1961.
Napomena: Ova citiranost nije uvijek 100% točna.