APA

Zarrug A., Bois C., Organization of Arab Petroleum Exporting Countries O., World Petroleum Congress (11th. : 1983 : London), Bois C. & Organization of Arab Petroleum Exporting Countries O.Potential oil reserves in the middle east and north Africa. : .

Chicago

Zarrug A.Y, Bois C, Organization of Arab Petroleum Exporting Countries OAPEC, World Petroleum Congress (11th. : 1983 : London), Bois C and Organization of Arab Petroleum Exporting Countries OAPEC.Potential oil reserves in the middle east and north Africa. : .

Harvard

Zarrug A., Bois C., Organization of Arab Petroleum Exporting Countries O., World Petroleum Congress (11th. : 1983 : London), Bois C. and Organization of Arab Petroleum Exporting Countries O.Potential oil reserves in the middle east and north Africa. : .

MLA

Zarrug A.Y, Bois C, Organization of Arab Petroleum Exporting Countries OAPEC, World Petroleum Congress (11th. : 1983 : London), Bois C and Organization of Arab Petroleum Exporting Countries OAPEC.: . .