APA (7th ed.) Citation

Lobachevski, N. (1914). Geometrical researches on the theory of parallels. Open Court Publishing Company.

Chicago Style (17th ed.) Citation

Lobachevski, Nicholas. Geometrical Researches on the Theory of Parallels. LaSalle: Open Court Publishing Company, 1914.

MLA (9th ed.) Citation

Lobachevski, Nicholas. Geometrical Researches on the Theory of Parallels. Open Court Publishing Company, 1914.