APA (7th ed.) Citation

Spooner, G. (1962). Mathematics enrichment: Geometry. Harcourt.

Chicago Style (17th ed.) Citation

Spooner, George. Mathematics Enrichment: Geometry. New York: Harcourt, 1962.

MLA (9th ed.) Citation

Spooner, George. Mathematics Enrichment: Geometry. Harcourt, 1962.