GREENBERG, M. J. (1974). Euclidean and non-euclidean geometries. W.H.Freeman and co.
芝加哥风格引文GREENBERG, Marvin Jay. Euclidean and Non-euclidean Geometries. San Francisco: W.H.Freeman and co, 1974.
MLA引文GREENBERG, Marvin Jay. Euclidean and Non-euclidean Geometries. W.H.Freeman and co, 1974.
警告：这些引文格式不一定是100％准确.