Παραπομπή σε μορφή APA (7η εκδ.)

Greenberg, M. J. (1980). Euclidean and non-Euclidean geometries: Development and history (2nd ed.). W.H. Freeman and Company.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Greenberg, Marvin J. Euclidean and Non-Euclidean Geometries: Development and History. 2nd ed. San Francisco: W.H. Freeman and Company, 1980.

Παραπομπή σε μορφή MLA (8th εκδ.)

Greenberg, Marvin J. Euclidean and Non-Euclidean Geometries: Development and History. 2nd ed. W.H. Freeman and Company, 1980.