APA (7th ed.) Zitazioa

Willoughby, S. S. (1991). Real math. Open Court.

Chicago Style (17th ed.) Zitazioa

Willoughby, Stephen S. Real Math. La Salle: Open Court, 1991.

MLA (9th ed.) Zitazioa

Willoughby, Stephen S. Real Math. Open Court, 1991.