Dyfyniad APA

Pearson, H. (2003). Mystery virus slow to yield its identity as patient numbers rise. Nature.

Dyfyniad Arddull Chicago

Pearson, Helen. "Mystery Virus Slow to Yield Its Identity As Patient Numbers Rise." Nature 2003.

Dyfyniad MLA

Pearson, Helen. "Mystery Virus Slow to Yield Its Identity As Patient Numbers Rise." Nature 2003.

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