(2003). Drug firms told to seek PDEA's permission. Manila Times.
Dyfyniad Arddull Chicago"Drug Firms Told to Seek PDEA's Permission." Manila Times 2003.
Dyfyniad MLA"Drug Firms Told to Seek PDEA's Permission." Manila Times, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.