Cita APA (7th ed.)
Gass, I. (1972). Understanding The Earth. A Reader in the Earth Sciences. Massachusetts Institute of Technology.
Cita Chicago (17th ed.)
Gass, I.G. Understanding The Earth. A Reader in the Earth Sciences. Cambridge, EUA: Massachusetts Institute of Technology, 1972.
Cita MLA (9th ed.)
Gass, I.G. Understanding The Earth. A Reader in the Earth Sciences. Massachusetts Institute of Technology, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.