Cita APA (7a ed.)
Herr, T., & Johnson, K. (1994). Problem solving strategies: Crossing the river with dogs : and other mathematical adventures. Key Curriculum Press.
Cita Chicago Style (17a ed.)
Herr, Ted, y Ken Johnson. Problem Solving Strategies: Crossing the River with Dogs : And Other Mathematical Adventures. Berkeley, Calif.: Key Curriculum Press, 1994.
Cita MLA (9a ed.)
Herr, Ted, y Ken Johnson. Problem Solving Strategies: Crossing the River with Dogs : And Other Mathematical Adventures. Key Curriculum Press, 1994.
Precaución: Estas citas no son 100% exactas.