Schutte, K., & Crossley, J. (1977). Proof theory. Springer-Verlag.
Chicago Edition CitationSchutte, Kurt, i J.N Crossley. Proof Theory. New York: Springer-Verlag, 1977.
Cita MLASchutte, Kurt, i J.N Crossley. Proof Theory. Springer-Verlag, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.