APA (7th ed.) Zitazioa

Willoughby, S. S. (1987). Real math. Open court.

Chicago Style (17th ed.) Zitazioa

Willoughby, Stephen S. Real Math. La Salle: Open court, 1987.

MLA (9th ed.) Zitazioa

Willoughby, Stephen S. Real Math. Open court, 1987.