Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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