Tohutoro APA (7th ed.)
Willoughby, S. S. (1981). Real math. Open court.
Tohutoru Kātū Chicago (17th ed.)
Willoughby, Stephen S. Real Math. La Salle: Open court, 1981.
Tohutoro MLA (9th ed.)
Willoughby, Stephen S. Real Math. Open court, 1981.
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