Lorenzen, P. (1958). Formale Logik. De Gruyter.
Chicago Style (17th ed.) CitationLorenzen, Paul. Formale Logik. Berlin: De Gruyter, 1958.
MLA (8th ed.) CitationLorenzen, Paul. Formale Logik. De Gruyter, 1958.
Warning: These citations may not always be 100% accurate.