Jeffrey, R. C. (1967). Formal logic: Its scope and limits. McGraw-Hill.
Chicago Edition CitationJeffrey, Richard C. Formal Logic: Its Scope and Limits. New York: McGraw-Hill, 1967.
Cita MLAJeffrey, Richard C. Formal Logic: Its Scope and Limits. McGraw-Hill, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.