APA (7th ed.) Citation

(1979). Problem-solving in arithmetic and algebra (2. print.). National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Problem-solving in Arithmetic and Algebra. 2. print. Reston: National Council of Teachers of Mathematics, 1979.

MLA (9th ed.) Citation

Problem-solving in Arithmetic and Algebra. 2. print. National Council of Teachers of Mathematics, 1979.