Lumabas, R. S. (1980). Plane and spherical trigonometry. Alemar-Phoenix Pub.
Chicago Style (17th ed.) CitationLumabas, Rogelio S. Plane and Spherical Trigonometry. Quezon City: Alemar-Phoenix Pub, 1980.
MLA (9th ed.) CitationLumabas, Rogelio S. Plane and Spherical Trigonometry. Alemar-Phoenix Pub, 1980.
Warning: These citations may not always be 100% accurate.