APA (7th ed.) Citation

Cofman, J. (1990). What to solve?: Problems and suggestions for young mathematicians. Clarendon Press.

Chicago Style (17th ed.) Citation

Cofman, Judita. What to Solve?: Problems and Suggestions for Young Mathematicians. Oxford: Clarendon Press, 1990.

MLA (9th ed.) Citation

Cofman, Judita. What to Solve?: Problems and Suggestions for Young Mathematicians. Clarendon Press, 1990.

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