Plane trigonometry,
by George Wentworth and David Eugene Smith.
APA Citation
Wentworth, G. A. (George Albert)., Smith, D. Eugene. (1914). Plane trigonometry. Boston: Ginn and company.
MLA Citation
Wentworth, G. A. (George Albert), 1835-1906, and David Eugene Smith. Plane Trigonometry. Boston: Ginn and company, 1914.
Warning: These citations may not always be complete (especially for serials).