Gaya APA

Greenberg, M, J. (1973). Euclidean and Non-Euclidean Geometries : Development and History (Ed. 1). San Francisco: W.H. Freeman and Company.

Gaya MLA

Greenberg, Marvin, Jay. "Euclidean and Non-Euclidean Geometries : Development and History". Ed. 1 San Francisco: W.H. Freeman and Company, 1973. Text.