APA

Lawlor D. A., Ness A. R., Cope A. M., Davis A., Insall P. & Riddoch C. (20030416). The challenges of evaluating environmental interventions to increase population levels of physical activity: the case of the UK National Cycle Network. : Journal of epidemiology and community health.

Chicago

Lawlor D A, Ness A R, Cope A M, Davis A, Insall P and Riddoch C. 20030416. The challenges of evaluating environmental interventions to increase population levels of physical activity: the case of the UK National Cycle Network. : Journal of epidemiology and community health.

Harvard

Lawlor D. A., Ness A. R., Cope A. M., Davis A., Insall P. and Riddoch C. (20030416). The challenges of evaluating environmental interventions to increase population levels of physical activity: the case of the UK National Cycle Network. : Journal of epidemiology and community health.

MLA

Lawlor D A, Ness A R, Cope A M, Davis A, Insall P and Riddoch C. The challenges of evaluating environmental interventions to increase population levels of physical activity: the case of the UK National Cycle Network. : Journal of epidemiology and community health. 20030416.