Welchons, A. M. (1944). Solid Geometry: A Self-Teaching Course. Ginn.
Cita Chicago Style (17a ed.)Welchons, A. M. Solid Geometry: A Self-Teaching Course. Washington: Ginn, 1944.
Cita MLA (9a ed.)Welchons, A. M. Solid Geometry: A Self-Teaching Course. Ginn, 1944.
警告：這些引文格式不一定是100％准確.