Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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