APA-viite (7. p.)
National Council of Teachers of Mathematics. Mathematics teaching in the middle school. [National Council of Teachers of Mathematics].
Chicago-viite (17. p.)
National Council of Teachers of Mathematics. Mathematics Teaching in the Middle School. [Reston, VA]: [National Council of Teachers of Mathematics].
MLA-viite (9. p.)
National Council of Teachers of Mathematics. Mathematics Teaching in the Middle School. [National Council of Teachers of Mathematics].
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