APA (7th ed.) Citation

Gough, D., Oliver, S., & Thomas, J. (2012). An introduction to systematic reviews. SAGE.

Chicago Style (17th ed.) Citation

Gough, David, Sandy Oliver, and James Thomas. An Introduction to Systematic Reviews. London: SAGE, 2012.

MLA (8th ed.) Citation

Gough, David, et al. An Introduction to Systematic Reviews. SAGE, 2012.