Mercury, cyanide gone in mining test project: PH's first clean gold, copper processing technology launched in Benguet. Manila Bulletin.
Chicago (17e ed.) Bronvermelding"Mercury, Cyanide Gone in Mining Test Project: PH's First Clean Gold, Copper Processing Technology Launched in Benguet." Manila Bulletin .
MLA (9e ed.) Bronvermelding"Mercury, Cyanide Gone in Mining Test Project: PH's First Clean Gold, Copper Processing Technology Launched in Benguet." Manila Bulletin, .
Let op: Deze citaties zijn niet altijd 100% accuraat.