Ragan, D. M. (1985). Structural geology: An introduction to geometrical techniques. John Wiley.
Cita Chicago (17th ed.)Ragan, Donal M. Structural Geology: An Introduction to Geometrical Techniques. New York: John Wiley, 1985.
Cita MLA (9th ed.)Ragan, Donal M. Structural Geology: An Introduction to Geometrical Techniques. John Wiley, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.