Byron, A., & Berry, A. (2011). Using Drupal (2nd ed.). O'Reilly.
Chicago Style (17th ed.) CitationByron, Angela, and Addison Berry. Using Drupal. 2nd ed. Cambridge, [Mass.]: O'Reilly, 2011.
MLA (8th ed.) CitationByron, Angela, and Addison Berry. Using Drupal. 2nd ed. O'Reilly, 2011.
Warning: These citations may not always be 100% accurate.