Cita APA

Welchons, A. M., & Krickenberger, W. R. (1943). Plane geometry (rev. edition.). Boston, Massachusetts: Ginn.

Citación estilo Chicago

Welchons, Alvin M., y William R. Krickenberger. Plane Geometry. rev. edition. Boston, Massachusetts: Ginn, 1943.

Cita MLA

Welchons, Alvin M., y William R. Krickenberger. Plane Geometry. rev. edition. Boston, Massachusetts: Ginn, 1943.