Rees, A. R., & Purcell, H. (1982). Disease and the environment. John Wiley and Sons.
Dyfyniad Arddull ChicagoRees, A. R., and H.J Purcell. Disease and the Environment. John Wiley and Sons, 1982.
Dyfyniad MLARees, A. R., and H.J Purcell. Disease and the Environment. John Wiley and Sons, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.