Syddall, H., Simmonds, S., Martin, H., Watson, C., Dennison, E., Cooper, C., & Sayer, A. (2010). Cohort profile: The Hertfordshire Ageing Study (HAS).
Lua i Stíl Chicago (17ú heag.)Syddall, H., S. Simmonds, H. Martin, C. Watson, E. Dennison, C. Cooper, agus A. Sayer. Cohort Profile: The Hertfordshire Ageing Study (HAS). 2010.
Lua MLA (9ú heag.)Syddall, H., et al. Cohort Profile: The Hertfordshire Ageing Study (HAS). 2010.
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