APA (7th ed.) Citation

Hall, M., Padua, D., & Pingali, K. (2009). Authors' Response. Communications of the ACM, 52(5), 7.

Chicago Style (17th ed.) Citation

Hall, Mary, David Padua, and Keshav Pingali. "Authors' Response." Communications of the ACM 52, no. 5 (2009): 7.

MLA (9th ed.) Citation

Hall, Mary, et al. "Authors' Response." Communications of the ACM, vol. 52, no. 5, 2009, p. 7.