APA (7th ed.) Zitazioa

Irving, R. (2013). Beyond the quadratic formula. Mathematical Association of America.

Chicago Style (17th ed.) Zitazioa

Irving, Ron. Beyond the Quadratic Formula. Washington, D.C.: Mathematical Association of America, 2013.

MLA (9th ed.) Zitazioa

Irving, Ron. Beyond the Quadratic Formula. Mathematical Association of America, 2013.