-. The Journal of the American Medical Association, vol 133, No. 9/ March, 1947. American Medical Association.
Dyfyniad Arddull Chicago-. The Journal of the American Medical Association, Vol 133, No. 9/ March, 1947. American Medical Association.
Dyfyniad MLA-. The Journal of the American Medical Association, Vol 133, No. 9/ March, 1947. American Medical Association.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.