Gaya APA
Greenberg, M, J. (1974).
Euclidean & Non-Euclidean Geometries; development & History. .
San Francisco:
W.H. Freeman and Company.
Gaya MLA
Greenberg, Marvin, Jay..
"Euclidean & Non-Euclidean Geometries; development & History.".
San Francisco:
W.H. Freeman and Company,
1974.
Text.