Dyfyniad APA

Margetts, B. M., & Nelson, M. (1991). Design concepts in nutritional epidemiology. Oxford University Press.

Dyfyniad Arddull Chicago

Margetts, Barrie M., and Michael Nelson. Design Concepts in Nutritional Epidemiology. Oxford, Eng.: Oxford University Press, 1991.

Dyfyniad MLA

Margetts, Barrie M., and Michael Nelson. Design Concepts in Nutritional Epidemiology. Oxford University Press, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.