APA (7th ed.) Citation

Seydel, K. (1980). Geometry: An exercise in reasoning. Saunders.

Chicago Style (17th ed.) Citation

Seydel, Ken. Geometry: An Exercise in Reasoning. Philadelphia: Saunders, 1980.

MLA (9th ed.) Citation

Seydel, Ken. Geometry: An Exercise in Reasoning. Saunders, 1980.