APA

Naini A. A., Hillary R. B., Alberta Energy Company, Hillary Resource Group, World Petroleum Congress (15th. : 1997 : Beijing), Hillary R. B., Alberta Energy Company & Hillary Resource Group.The middle east as a future source of gas supply to western Europe. : .

Chicago

Naini Abbas A, Hillary Richard B, Alberta Energy Company, Hillary Resource Group, World Petroleum Congress (15th. : 1997 : Beijing), Hillary Richard B, Alberta Energy Company and Hillary Resource Group.The middle east as a future source of gas supply to western Europe. : .

Harvard

Naini A. A., Hillary R. B., Alberta Energy Company, Hillary Resource Group, World Petroleum Congress (15th. : 1997 : Beijing), Hillary R. B., Alberta Energy Company and Hillary Resource Group.The middle east as a future source of gas supply to western Europe. : .

MLA

Naini Abbas A, Hillary Richard B, Alberta Energy Company, Hillary Resource Group, World Petroleum Congress (15th. : 1997 : Beijing), Hillary Richard B, Alberta Energy Company and Hillary Resource Group.: . .