Brannan, D. A., Esplen, M. F., & Gray, J. (1999). Geometry. Cambridge University Press.
Dyfyniad Arddull ChicagoBrannan, D. A., Matthew F. Esplen, and Jeremy Gray. Geometry. Cambridge ; New York: Cambridge University Press, 1999.
Dyfyniad MLABrannan, D. A., et al. Geometry. Cambridge University Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.