Dyfyniad APA
Fenchel, W., Nielsen, J., & Schmidt, A. L. (2003). Discontinuous groups of isometries in the hyperbolic plane. Walter de Gruyter.
Dyfyniad Arddull Chicago
Fenchel, W., Jakob Nielsen, and Asmus L. Schmidt. Discontinuous Groups of Isometries in the Hyperbolic Plane. Berlin ; New York: Walter de Gruyter, 2003.
Dyfyniad MLA
Fenchel, W., et al. Discontinuous Groups of Isometries in the Hyperbolic Plane. Walter de Gruyter, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.