Walter, M. I. (1970). Boxes, squares and other things: A teacher's guide for a unit in informal geometry. National Council of Teachers of Mathematics.
Chicago Style (17th ed.) CitationWalter, Marion I. Boxes, Squares and Other Things: A Teacher's Guide for a Unit in Informal Geometry. Virginia: National Council of Teachers of Mathematics, 1970.
MLA (8th ed.) CitationWalter, Marion I. Boxes, Squares and Other Things: A Teacher's Guide for a Unit in Informal Geometry. National Council of Teachers of Mathematics, 1970.
Warning: These citations may not always be 100% accurate.
