APA (7th ed.) Citation

National Council of Teachers of Mathematics. (1957). Insights into modern mathematics: Twenty-third yearbook.

Chicago Style (17th ed.) Citation

National Council of Teachers of Mathematics. Insights into Modern Mathematics: Twenty-third Yearbook. Washington, 1957.

MLA (9th ed.) Citation

National Council of Teachers of Mathematics. Insights into Modern Mathematics: Twenty-third Yearbook. 1957.

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