Gaya APA

, ., Ashlock, R, B. (2010). Error patterns in computation: using error patterns to help each student learn . Boston: Boston: Allyn & Bacon, 2010.

Gaya MLA

, ., Ashlock, Robert, B. "Error patterns in computation: using error patterns to help each student learn". Boston: Boston: Allyn & Bacon, 2010, 2010. .