APA-viite

Keen, L., & Lakic, N. (2007). Hyperbolic geometry from a local viewpoint. Cambridge University.

Chicago-tyylinen lähdeviittaus

Keen, Linda, ja Nikola Lakic. Hyperbolic Geometry from a Local Viewpoint. Cambridge: Cambridge University, 2007.

MLA-viite

Keen, Linda, ja Nikola Lakic. Hyperbolic Geometry from a Local Viewpoint. Cambridge University, 2007.