APA (7th ed.) Citation

Thomas, D. A. (1998). Active geometry. Brooks/Cole Publishing.

Chicago Style (17th ed.) Citation

Thomas, David A. Active Geometry. Pacific Grove, CA: Brooks/Cole Publishing, 1998.

MLA (9th ed.) Citation

Thomas, David A. Active Geometry. Brooks/Cole Publishing, 1998.

Warning: These citations may not always be 100% accurate.