APA (7th ed.) Citation

Johnson, K., & Herr, T. (2001). Problem solving strategies: Crossing the river with dogs and other mathematical adventures ; instructor's resource book and answer key (2. ed.). Key Curriculum Press.

Chicago Style (17th ed.) Citation

Johnson, Ken, and Ted Herr. Problem Solving Strategies: Crossing the River with Dogs and Other Mathematical Adventures ; Instructor's Resource Book and Answer Key. 2. ed. Emeryville, Calif: Key Curriculum Press, 2001.

MLA (9th ed.) Citation

Johnson, Ken, and Ted Herr. Problem Solving Strategies: Crossing the River with Dogs and Other Mathematical Adventures ; Instructor's Resource Book and Answer Key. 2. ed. Key Curriculum Press, 2001.