Herr, T., & Johnson, K. (1994). Problem solving strategies: Crossing the river with dogs : and other mathematical adventures. Key Curriculum Press.
Цитирование в стиле Чикаго (17-е изд.)Herr, Ted, и Ken Johnson. Problem Solving Strategies: Crossing the River with Dogs : And Other Mathematical Adventures. Berkeley, Calif.: Key Curriculum Press, 1994.
Цитирование MLA (9-е изд.)Herr, Ted, и Ken Johnson. Problem Solving Strategies: Crossing the River with Dogs : And Other Mathematical Adventures. Key Curriculum Press, 1994.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.