Cita APA

Roman, S. M., & Rota, G. (1975). The Umbral Calculus. California: The University of California.

Chicago Style Citation

Roman, Steven M., i Gian-carlo Rota. The Umbral Calculus. California: The University of California, 1975.

Cita MLA

Roman, Steven M., i Gian-carlo Rota. The Umbral Calculus. California: The University of California, 1975.

Atenció: Aquestes cites poden no estar 100% correctes.