APA (7th ed.) Citation

Petroleum Economist Ltd, Petroleum Economist Cartographic (Firm), Petróleo Brasileiro, S.A, NPA Satellite Mapping (Firm), Fuller, K., & Bush, P. (2005). National oil companies of the world map. Petroleum Economist Cartographic.

Chicago Style (17th ed.) Citation

Petroleum Economist Ltd, Petroleum Economist Cartographic (Firm), S.A Petróleo Brasileiro, NPA Satellite Mapping (Firm), K. Fuller, and P. Bush. National Oil Companies of the World Map. London: Petroleum Economist Cartographic, 2005.

MLA (9th ed.) Citation

Petroleum Economist Ltd, et al. National Oil Companies of the World Map. Petroleum Economist Cartographic, 2005.