Leonard, I. E., & Leonard, I. E. (2014). Classical geometry: Euclidean, transformational, inversive, and projective. Wiley.
Lua i Stíl Chicago (17ú heag.)Leonard, I. E., agus I. E. Leonard. Classical Geometry: Euclidean, Transformational, Inversive, and Projective. Hoboken, New Jersey: Wiley, 2014.
Lua MLA (9ú heag.)Leonard, I. E., agus I. E. Leonard. Classical Geometry: Euclidean, Transformational, Inversive, and Projective. Wiley, 2014.
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