Tan, V. A. (1957). Plane and spherical trigonometry with solid geometry. Macaraig Publishing.
Citazione stile Chigago Style (17a edizione)Tan, Vidal A. Plane and Spherical Trigonometry with Solid Geometry. Manila: Macaraig Publishing, 1957.
Citatione MLA (9a ed.)Tan, Vidal A. Plane and Spherical Trigonometry with Solid Geometry. Macaraig Publishing, 1957.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.