APA (7e ed.) Bronvermelding

(1990). Natural gas: Its role and potential in economic development. Westview pr..

Chicago (17e ed.) Bronvermelding

Natural Gas: Its Role and Potential in Economic Development. Boulder: Westview pr., 1990.

MLA (9e ed.) Bronvermelding

Natural Gas: Its Role and Potential in Economic Development. Westview pr., 1990.

Let op: Deze citaties zijn niet altijd 100% accuraat.