Παραπομπή APA

Barr, M., & Wells, C. (1985). Toposes,triples and theories. Springer-Verlag.

Παραπομπή Chicago Style

Barr, Michael, και Charles Wells. Toposes,triples and Theories. New York: Springer-Verlag, 1985.

Παραπομπή MLA

Barr, Michael, και Charles Wells. Toposes,triples and Theories. Springer-Verlag, 1985.