Cita APA (7th ed.)

Hart, W. W. (1950). Plane geometry. D.C. Health and Company.

Cita Chicago (17th ed.)

Hart, Walter Wilson. Plane Geometry. Boston: D.C. Health and Company, 1950.

Cita MLA (9th ed.)

Hart, Walter Wilson. Plane Geometry. D.C. Health and Company, 1950.