Degen, J. W. (1983). Systeme der kumulativen Logik. Philosophia-Verlag.
Chicago Style (17th ed.) CitationDegen, Josef Wolfgang. Systeme Der Kumulativen Logik. München [u.a.]: Philosophia-Verlag, 1983.
MLA (9th ed.) CitationDegen, Josef Wolfgang. Systeme Der Kumulativen Logik. Philosophia-Verlag, 1983.
Warning: These citations may not always be 100% accurate.