APA (7th ed.) Citation

Cofman, J. (1991). What to solve?: Problems and suggestions for young mathematicians (Reprinted.). Clarendon Press.

Chicago Style (17th ed.) Citation

Cofman, Judita. What to Solve?: Problems and Suggestions for Young Mathematicians. Reprinted. Oxford: Clarendon Press, 1991.

MLA (9th ed.) Citation

Cofman, Judita. What to Solve?: Problems and Suggestions for Young Mathematicians. Reprinted. Clarendon Press, 1991.