APA (7th ed.) Citation

Keiffer, M. (1955). How to develop a teaching guide in mathematics. National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Keiffer, Mildred. How to Develop a Teaching Guide in Mathematics. Washington: National Council of Teachers of Mathematics, 1955.

MLA (9th ed.) Citation

Keiffer, Mildred. How to Develop a Teaching Guide in Mathematics. National Council of Teachers of Mathematics, 1955.

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