APA (7th ed.) Citation

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.) Citation

Walter, Marion I. Boxes, Squares, and Other Things: A Teacher's Guide for a Unit in Informal Geometry. Washington: National Council of Teachers of Mathematics, 1970.

MLA (9th ed.) Citation

Walter, Marion I. Boxes, Squares, and Other Things: A Teacher's Guide for a Unit in Informal Geometry. National Council of Teachers of Mathematics, 1970.