Dyfyniad APA

World Health Organization. (2005). Control of yellow fever: Field Guide. Pan American Health Organization.

Dyfyniad Arddull Chicago

World Health Organization. Control of Yellow Fever: Field Guide. Washington, D. C: Pan American Health Organization, 2005.

Dyfyniad MLA

World Health Organization. Control of Yellow Fever: Field Guide. Pan American Health Organization, 2005.

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