Sorenson, J. S. (1996). The Power of problem solving: Practical ideas and teaching strategies for any K-8 subject area. Allyn and Bacon.
Chicago-viite (17. p.)Sorenson, Juanita S. The Power of Problem Solving: Practical Ideas and Teaching Strategies for Any K-8 Subject Area. Boston: Allyn and Bacon, 1996.
MLA-viite (9. p.)Sorenson, Juanita S. The Power of Problem Solving: Practical Ideas and Teaching Strategies for Any K-8 Subject Area. Allyn and Bacon, 1996.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.