APA (7th ed.) Citation

National Council of teachers of Mathematics. (1968). More topics in mathematics for elementary school teachers. NCTM.

Chicago Style (17th ed.) Citation

National Council of teachers of Mathematics. More Topics in Mathematics for Elementary School Teachers. Washington: NCTM, 1968.

MLA (9th ed.) Citation

National Council of teachers of Mathematics. More Topics in Mathematics for Elementary School Teachers. NCTM, 1968.

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