Marks, J. L., Purdy, C. R., & Kinney, L. B. (1965). Teaching elementary school mathematics for understanding (2nd ed.). McGraw-Hill.
Цитирование в стиле Чикаго (17-е изд.)Marks, John L., C. Richard Purdy, и Lucien B. Kinney. Teaching Elementary School Mathematics for Understanding. 2nd ed. New York: McGraw-Hill, 1965.
Цитирование MLA (9-е изд.)Marks, John L., et al. Teaching Elementary School Mathematics for Understanding. 2nd ed. McGraw-Hill, 1965.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.