National Council of Teachers of Mathematics. (1954). The Arithmetic teacher. National Council of Teachers of Mathematics.
Цитирование в стиле Чикаго (17-е изд.)National Council of Teachers of Mathematics. The Arithmetic Teacher. Washington, D.C: National Council of Teachers of Mathematics, 1954.
Цитирование MLA (9-е изд.)National Council of Teachers of Mathematics. The Arithmetic Teacher. National Council of Teachers of Mathematics, 1954.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.