Παραπομπή σε μορφή APA (7η εκδ.)

Charpa, U. (2011). The Cambridge "Realgymnasiusm" and the "Freie Schule" London: Historical and philosophical remarks on Gerd Buchdahl and Karl R. Popper / Ulrich Charpa. Year Book / Leo Baeck Institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Charpa, Ulrich. "The Cambridge "Realgymnasiusm" and the "Freie Schule" London: Historical and Philosophical Remarks on Gerd Buchdahl and Karl R. Popper / Ulrich Charpa." Year Book / Leo Baeck Institute 2011.

Παραπομπή σε μορφή MLA (8th εκδ.)

Charpa, Ulrich. "The Cambridge "Realgymnasiusm" and the "Freie Schule" London: Historical and Philosophical Remarks on Gerd Buchdahl and Karl R. Popper / Ulrich Charpa." Year Book / Leo Baeck Institute, 2011.