APA (7th ed.) Citation

Schofield, P., Perkes, I., Butler, T., & Hollis, S. (2011). Letter to the editor - Response.

Chicago Style (17th ed.) Citation

Schofield, P., I. Perkes, Tony Butler, and S. Hollis. Letter to the Editor - Response. 2011.

MLA (9th ed.) Citation

Schofield, P., et al. Letter to the Editor - Response. 2011.