APA (7th ed.) Citation

Valderas, J., Starfield, B., & Roland, M. (2007). A research priority in the UK [6].

Chicago Style (17th ed.) Citation

Valderas, J., B. Starfield, and M. Roland. A Research Priority in the UK [6]. 2007.

MLA (9th ed.) Citation

Valderas, J., et al. A Research Priority in the UK [6]. 2007.