Pan American Sanitary Bureau & Pan American Health Organization. (1973). Bulletin of the Pan American Health Organization. Pan American Health Organization.
Dyfyniad Arddull ChicagoPan American Sanitary Bureau and Pan American Health Organization. Bulletin of the Pan American Health Organization. Washington, D.C: Pan American Health Organization, 1973.
Dyfyniad MLAPan American Sanitary Bureau and Pan American Health Organization. Bulletin of the Pan American Health Organization. Pan American Health Organization, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.