APA citiranje

Langa, K. M., Llewellyn, D. J., Lang, I. A., Weir, D. R., Wallace, R. B., Kabeto, M. U., & Huppert, F. A. (2009). Cognitive health among older adults in the United States and in England. BioMed Central.

Citação norma Chicago

Langa, Kenneth M., David J. Llewellyn, Iain A. Lang, David R. Weir, Robert B. Wallace, Mohammed U. Kabeto, and Felicia A. Huppert. Cognitive Health Among Older Adults in the United States and in England. BioMed Central, 2009.

MLA citiranje

Langa, Kenneth M., et al. Cognitive Health Among Older Adults in the United States and in England. BioMed Central, 2009.