Dyfyniad APA

Barker, D. B. (1976). Practical epidemiology (2nd.). Churchill livingstone.

Dyfyniad Arddull Chicago

Barker, D.J.P. Bennett. Practical Epidemiology. 2nd. Singapore: Churchill livingstone, 1976.

Dyfyniad MLA

Barker, D.J.P. Bennett. Practical Epidemiology. 2nd. Churchill livingstone, 1976.

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