Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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