APA Citatie

Hewitt, J., Smeeth, L., Bulpitt, C., Tulloch, A., & Fletcher, A. (2005). Respiratory symptoms in older people and their association with mortality. BMJ Group.

Chicago Style citaat

Hewitt, J., L. Smeeth, C. Bulpitt, A. Tulloch, en A. Fletcher. Respiratory Symptoms in Older People and Their Association With Mortality. BMJ Group, 2005.

MLA citatie

Hewitt, J., et al. Respiratory Symptoms in Older People and Their Association With Mortality. BMJ Group, 2005.