APA (7th ed.) Citation

Steenrod, N. E., & Epstein, D. B. A. (1962). Cohomology operations. Princeton University.

Chicago Style (17th ed.) Citation

Steenrod, N. E., and D. B. A. Epstein. Cohomology Operations. Princeton: Princeton University, 1962.

MLA (9th ed.) Citation

Steenrod, N. E., and D. B. A. Epstein. Cohomology Operations. Princeton University, 1962.