Não informado. (1927). Colloquium Publications of the American Mathematical Society. American Mathematical Society.
Chicago-Zitierstil (17. Ausg.)Não informado. Colloquium Publications of the American Mathematical Society. Providence, RI: American Mathematical Society, 1927.
MLA-Zitierstil (8. Ausg.)Não informado. Colloquium Publications of the American Mathematical Society. American Mathematical Society, 1927.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.