Lathrop, T. G., & Stevens, L. A. (1967). Geometry: A contemporary approach. California: Wadsworth Publishing company.
Dyfyniad Arddull ChicagoLathrop, Thomas G., và Lee A. Stevens. Geometry: A Contemporary Approach. California: Wadsworth Publishing company, 1967.
Dyfyniad MLALathrop, Thomas G., và Lee A. Stevens. Geometry: A Contemporary Approach. California: Wadsworth Publishing company, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.