National Geographic Society (U.S.). Book Division. (1995). Raging forces: Earth in upheaval. The Society.
Chicago (17e ed.) BronvermeldingNational Geographic Society (U.S.). Book Division. Raging Forces: Earth in Upheaval. Washington, D.C: The Society, 1995.
MLA (9e ed.) BronvermeldingNational Geographic Society (U.S.). Book Division. Raging Forces: Earth in Upheaval. The Society, 1995.
Let op: Deze citaties zijn niet altijd 100% accuraat.