APA (7th ed.) Citation

(1978). Instruction in problem solving (2. print.). National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Instruction in Problem Solving. 2. print. Reston: National Council of Teachers of Mathematics, 1978.

MLA (9th ed.) Citation

Instruction in Problem Solving. 2. print. National Council of Teachers of Mathematics, 1978.

Warning: These citations may not always be 100% accurate.