Todd, J. (1951). Table of arctangents of rational numbers. UNited States Department of Commerce. National Bureau of Standards.
Lua i Stíl Chicago (17ú heag.)Todd, John. Table of Arctangents of Rational Numbers. Washington: UNited States Department of Commerce. National Bureau of Standards, 1951.
Lua MLA (9ú heag.)Todd, John. Table of Arctangents of Rational Numbers. UNited States Department of Commerce. National Bureau of Standards, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.