Hart, W. W. (1950). Plane geometry. D.C. Health and Company.
Chicago-čujuhus (17. p.)Hart, Walter Wilson. Plane Geometry. Boston: D.C. Health and Company, 1950.
MLA-čujuhus (9. p.)Hart, Walter Wilson. Plane Geometry. D.C. Health and Company, 1950.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.