APA (7th ed.) Citation

Karpinski, L. C., Calhoun, J. W., & Benedict, H. Y. (1918). Unified mathematics. Heath.

Chicago Style (17th ed.) Citation

Karpinski, Louis Charles, John William Calhoun, and Harry Y. Benedict. Unified Mathematics. Boston [u.a.]: Heath, 1918.

MLA (9th ed.) Citation

Karpinski, Louis Charles, et al. Unified Mathematics. Heath, 1918.