APA (7th ed.) Citation

Steen, L. A. (1978). Mathematics today: Twelve informal essays. Springer-Verlag.

Chicago Style (17th ed.) Citation

Steen, Lynn Arthur. Mathematics Today: Twelve Informal Essays. New York: Springer-Verlag, 1978.

MLA (9th ed.) Citation

Steen, Lynn Arthur. Mathematics Today: Twelve Informal Essays. Springer-Verlag, 1978.

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