Leonard, I. E., & Leonard, I. E. (2014). Classical geometry: Euclidean, transformational, inversive, and projective. Wiley.

Leonard, I. E., and I. E. Leonard. Classical Geometry: Euclidean, Transformational, Inversive, and Projective. Hoboken, New Jersey: Wiley, 2014.

Leonard, I. E., and I. E. Leonard. Classical Geometry: Euclidean, Transformational, Inversive, and Projective. Wiley, 2014.