توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

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

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

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

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

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