APA-ийн эшлэл(7 дахь хэвлэлт)

Herr, T., & Johnson, K. (1994). Problem solving strategies: Crossing the river with dogs : and other mathematical adventures. Key Curriculum Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Herr, Ted, ба Ken Johnson. Problem Solving Strategies: Crossing the River with Dogs : And Other Mathematical Adventures. Berkeley, Calif.: Key Curriculum Press, 1994.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Herr, Ted, ба Ken Johnson. Problem Solving Strategies: Crossing the River with Dogs : And Other Mathematical Adventures. Key Curriculum Press, 1994.