Lounsbury, J. F., & Ogden, L. (1979). Earth science (3rd ed.). Harper and Row.
Cita Chicago (17th ed.)Lounsbury, John F., i Lawrence Ogden. Earth Science. 3rd ed. New York: Harper and Row, 1979.
Cita MLA (9th ed.)Lounsbury, John F., i Lawrence Ogden. Earth Science. 3rd ed. Harper and Row, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.