APA (7th ed.) Citation

Armstrong, M., Cairns, B., Green, J., Reeves, G., Beral, V., & Collaborators, T. M. W. S. (2011). Reported frequency of physical activity in a large epidemiological study: Relationship to specific activities and repeatability over time. BioMed Central.

Chicago Style (17th ed.) Citation

Armstrong, M., B. Cairns, J. Green, G. Reeves, V. Beral, and The Million Women Study Collaborators. Reported Frequency of Physical Activity in a Large Epidemiological Study: Relationship to Specific Activities and Repeatability over Time. BioMed Central, 2011.

MLA (9th ed.) Citation

Armstrong, M., et al. Reported Frequency of Physical Activity in a Large Epidemiological Study: Relationship to Specific Activities and Repeatability over Time. BioMed Central, 2011.