Dyfyniad APA
ebrary, Inc, & Evans, G. (1997). Risk communication and vaccination: Summary of a workshop. National Academy Press.
Dyfyniad Arddull Chicago
ebrary, Inc, and Geoffrey Evans. Risk Communication and Vaccination: Summary of a Workshop. Washington, D.C.: National Academy Press, 1997.
Dyfyniad MLA
ebrary, Inc, and Geoffrey Evans. Risk Communication and Vaccination: Summary of a Workshop. National Academy Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.