Oglesby, E. J. a. H. R. C. (1929). Plane trigonometry. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Oglesby, Ernest Jackson and Hollis Raymond Cooley. Plane Trigonometry. New York: Prentice-Hall, 1929.
Lua MLA (9ú heag.)Oglesby, Ernest Jackson and Hollis Raymond Cooley. Plane Trigonometry. Prentice-Hall, 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.