APA (7th ed.) Citation

Pigott, T., & Shepperd, S. (2013). Identifying, documenting, and examining heterogeneity in systematic reviews of complex interventions.

Chicago Style (17th ed.) Citation

Pigott, T., and S. Shepperd. Identifying, Documenting, and Examining Heterogeneity in Systematic Reviews of Complex Interventions. 2013.

MLA (9th ed.) Citation

Pigott, T., and S. Shepperd. Identifying, Documenting, and Examining Heterogeneity in Systematic Reviews of Complex Interventions. 2013.

Warning: These citations may not always be 100% accurate.