Gaya APA

Shimada, S., Becker, , J, P. (2005). The open- ended approach : a new proposal for teaching mathematics . Virginia: National Council of Teachers of Mathematics.

Gaya MLA

Shimada, Shigeru., Becker, , Jerry, P.. "The open- ended approach : a new proposal for teaching mathematics". Virginia: National Council of Teachers of Mathematics, 2005. Text.