Sommerville, D. (1958). The elements of non-Euclidean geometry. Dover Publications, Inc.
Chicago Style (17th ed.) CitationSommerville, D.M.Y. The Elements of Non-Euclidean Geometry. New York, New York: Dover Publications, Inc, 1958.
MLA (9th ed.) CitationSommerville, D.M.Y. The Elements of Non-Euclidean Geometry. Dover Publications, Inc, 1958.
Warning: These citations may not always be 100% accurate.