Brink, R. W. (1928). Plane Trigonometry: A textbook for schools and colleges. D. Appleton - Century.
Lua i Stíl Chicago (17ú heag.)Brink, Raymond W. Plane Trigonometry: A Textbook for Schools and Colleges. New York: D. Appleton - Century, 1928.
Lua MLA (9ú heag.)Brink, Raymond W. Plane Trigonometry: A Textbook for Schools and Colleges. D. Appleton - Century, 1928.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.