Wolf Heydebrand; Beverly Burris (1984). The Limits of Praxis in Critical Theory. In: Judith Marcus & Zoltán Tar (Eds.), Foundations of the Frankfurt School of Social Research (pp. 401-417). New Brunswick, NJ: Transaction Books. p. 405. نسخة محفوظة 14 يناير 2020 على موقع واي باك مشين.
Richard Lacayo؛ Joelle Attinger (18 نوفمبر 1985). "Law: Critical Legal Times at Harvard". Time Magazine. ص. 87–88. Preview at Time.com: [1][وصلة مكسورة] (note: the preview displays an erroneous date of April 18, 2005, although the search results list shows the correct date).
Wolf Heydebrand; Beverly Burris (1984). The Limits of Praxis in Critical Theory. In: Judith Marcus & Zoltán Tar (Eds.), Foundations of the Frankfurt School of Social Research (pp. 401-417). New Brunswick, NJ: Transaction Books. p. 405. نسخة محفوظة 14 يناير 2020 على موقع واي باك مشين.