Hartshorne, R. (1997). Companion to Euclid: A course of geometry, based on Euclid's Elements and its modern descendants. AMS.
Chicago-Zitierstil (17. Ausg.)Hartshorne, Robin. Companion to Euclid: A Course of Geometry, Based on Euclid's Elements and Its Modern Descendants. Providence, RI: AMS, 1997.
MLA-Zitierstil (9. Ausg.)Hartshorne, Robin. Companion to Euclid: A Course of Geometry, Based on Euclid's Elements and Its Modern Descendants. AMS, 1997.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.