APA
World Oil Editors, . (2016). Key nations keep pumping despite oil price decline. : .
Chicago
World Oil Editors, . 2016. Key nations keep pumping despite oil price decline. : .
Harvard
World Oil Editors, . (2016). Key nations keep pumping despite oil price decline. : .
MLA
World Oil Editors, . Key nations keep pumping despite oil price decline. : . 2016.
