Bereiter, C., & Anderson, V. (1989). Willy the Wisher and other thinking stories: An Open Court thinking story book. Open Court.

Bereiter, Carl, and Valerie Anderson. Willy the Wisher and Other Thinking Stories: An Open Court Thinking Story Book. La Salle, Ill.: Open Court, 1989.

Bereiter, Carl, and Valerie Anderson. Willy the Wisher and Other Thinking Stories: An Open Court Thinking Story Book. Open Court, 1989.