Leonard, I. E., & Leonard, I. E. (2014). Classical geometry: Euclidean, transformational, inversive, and projective. Wiley.
Chicago-čujuhus (17. p.)Leonard, I. E., juo I. E. Leonard. Classical Geometry: Euclidean, Transformational, Inversive, and Projective. Hoboken, New Jersey: Wiley, 2014.
MLA-čujuhus (9. p.)Leonard, I. E., juo I. E. Leonard. Classical Geometry: Euclidean, Transformational, Inversive, and Projective. Wiley, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.