Cita APA (7th ed.)

National Council of Teachers of Mathematics. (1966). Experiences in mathematical discovery: Properties of operations with numbers. National Council of Teachers of Mathematics.

Cita Chicago (17th ed.)

National Council of Teachers of Mathematics. Experiences in Mathematical Discovery: Properties of Operations with Numbers. Washington, D. C: National Council of Teachers of Mathematics, 1966.

Cita MLA (9th ed.)

National Council of Teachers of Mathematics. Experiences in Mathematical Discovery: Properties of Operations with Numbers. National Council of Teachers of Mathematics, 1966.