Tohutoro APA (7th ed.)

Braver, S. (2011). Lobachevski illuminated. Mathematical Association of America.

Tohutoru Kātū Chicago (17th ed.)

Braver, Seth. Lobachevski Illuminated. [Washington, D.C.]: Mathematical Association of America, 2011.

Tohutoro MLA (9th ed.)

Braver, Seth. Lobachevski Illuminated. Mathematical Association of America, 2011.