APA (7th ed.) Citation

Harper, J. R. (2002). Secondary cohomology operations. American Mathematical Society. https://doi.org/10.1090/gsm/049

Chicago Style (17th ed.) Citation

Harper, John R. Secondary Cohomology Operations. Providence, Rhode Island: American Mathematical Society, 2002. https://doi.org/10.1090/gsm/049.

MLA (9th ed.) Citation

Harper, John R. Secondary Cohomology Operations. American Mathematical Society, 2002. https://doi.org/10.1090/gsm/049.