APA (7th ed.) Citation

Zickuhr, K., Rainie, L., Purcell, K., Madden, M., & Brenner, J. (2012). Libraries, Patrons, and E-Books.

Chicago Style (17th ed.) Citation

Zickuhr, Kathryn, Lee Rainie, Kristen Purcell, Mary Madden, and Joanna Brenner. Libraries, Patrons, and E-Books. 2012.

MLA (9th ed.) Citation

Zickuhr, Kathryn, et al. Libraries, Patrons, and E-Books. 2012.