Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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