APA (7th ed.) Citation

Steinhaus, H. (1963). One hundred problems in elementary mathematics. Pergamon Press ; Polish Scientific Publishers.

Chicago Style (17th ed.) Citation

Steinhaus, Hugo. One Hundred Problems in Elementary Mathematics. Oxford ; London : Warszawa: Pergamon Press ; Polish Scientific Publishers, 1963.

MLA (9th ed.) Citation

Steinhaus, Hugo. One Hundred Problems in Elementary Mathematics. Pergamon Press ; Polish Scientific Publishers, 1963.