Não informado. (1927). Colloquium Publications of the American Mathematical Society. American Mathematical Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Colloquium Publications of the American Mathematical Society. Providence, RI: American Mathematical Society, 1927.
Lua MLA (8ú heag.)Não informado. Colloquium Publications of the American Mathematical Society. American Mathematical Society, 1927.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.