APA (7th ed.) Citation

Sommerville, D. M. Y. (1970). Bibliography of non-euclidean geometry (2. ed., reprint of the 1. ed. London, Harrison, 1911.). Chelsea Publ. Co.

Chicago Style (17th ed.) Citation

Sommerville, Duncan M'Laren Young. Bibliography of Non-euclidean Geometry. 2. ed., reprint of the 1. ed. London, Harrison, 1911. New York, NY: Chelsea Publ. Co, 1970.

MLA (9th ed.) Citation

Sommerville, Duncan M'Laren Young. Bibliography of Non-euclidean Geometry. 2. ed., reprint of the 1. ed. London, Harrison, 1911. Chelsea Publ. Co, 1970.