APA (7th ed.) Citation

Harmer, C., Cowen, P., & Goodwin, G. (2011). Efficacy markers in depression.

Chicago Style (17th ed.) Citation

Harmer, C., P. Cowen, and G. Goodwin. Efficacy Markers in Depression. 2011.

MLA (9th ed.) Citation

Harmer, C., et al. Efficacy Markers in Depression. 2011.