APA (7th ed.) Citation

Parker, T. H., & Baldridge, S. (2008). Elementary geometry for teachers. Sefton-Ash Pub..

Chicago Style (17th ed.) Citation

Parker, Thomas H., and Scott Baldridge. Elementary Geometry for Teachers. Okemos, Mich.: Sefton-Ash Pub., 2008.

MLA (9th ed.) Citation

Parker, Thomas H., and Scott Baldridge. Elementary Geometry for Teachers. Sefton-Ash Pub., 2008.

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