The elements of non-Euclidean geometry

MLA

Sommerville, Duncan M'Laren Young. The Elements of Non-euclidean Geometry. New York: Dover Publications, 1958.

APA

Sommerville, D. M'Laren Young. (1958). The elements of non-Euclidean geometry. New York: Dover Publications.

Chicago

Sommerville, Duncan M'Laren Young, The Elements of Non-Euclidean Geometry. New York: Dover Publications, 1958.