Woodcock, A. E. R., & Poston, T. (1974). Geometrical study of the elementary catastrophes.
Dyfyniad Arddull ChicagoWoodcock, A E R., and T. Poston. Geometrical Study of the Elementary Catastrophes. Springer-Verlag, Berlin, 1974.
Dyfyniad MLAWoodcock, A E R., and T. Poston. Geometrical Study of the Elementary Catastrophes. 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.