Cita APA (7th ed.)

Clarke, R., Woodhouse, P., Ulvik, A., Frost, C., Sherliker, P., Refsum, H., . . . Khaw, K. (1998). Variability and determinants of total homocysteine concentrations in plasma in an elderly population.

Cita Chicago (17th ed.)

Clarke, R., P. Woodhouse, A. Ulvik, C. Frost, P. Sherliker, H. Refsum, P. Ueland, i K. Khaw. Variability and Determinants of Total Homocysteine Concentrations in Plasma in an Elderly Population. 1998.

Cita MLA (9th ed.)

Clarke, R., et al. Variability and Determinants of Total Homocysteine Concentrations in Plasma in an Elderly Population. 1998.