APA (7th ed.) Citation

Aston Louise M, Olson Ashley D, Ahern Amy L, & Jebb Susan A. (2011). Weight Watchers on prescription: An observational study of weight change among adults referred to Weight Watchers by the NHS. BMC.

Chicago Style (17th ed.) Citation

Aston Louise M, Olson Ashley D, Ahern Amy L, and Jebb Susan A. Weight Watchers on Prescription: An Observational Study of Weight Change Among Adults Referred to Weight Watchers by the NHS. BMC, 2011.

MLA (9th ed.) Citation

Aston Louise M, et al. Weight Watchers on Prescription: An Observational Study of Weight Change Among Adults Referred to Weight Watchers by the NHS. BMC, 2011.

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