MLA

Petticrew, Mark, and Helen Roberts. Systematic Reviews In the Social Sciences : a Practical Guide. Malden, MA: Blackwell Pub., 2006.

APA

Petticrew, M., & Roberts, H. (2006). Systematic reviews in the social sciences : a practical guide. Malden, MA: Blackwell Pub.

Chicago

Petticrew, Mark., and Helen Roberts. Systematic Reviews In the Social Sciences: A Practical Guide. Malden, MA: Blackwell Pub., 2006.