Ragan, D. M. (2009). Structural Geology: : an introduction to geometrical techniques. Cambridge university.
Cita Chicago (17th ed.)Ragan, Donal M. Structural Geology: : An Introduction to Geometrical Techniques. New York: Cambridge university, 2009.
Cita MLA (9th ed.)Ragan, Donal M. Structural Geology: : An Introduction to Geometrical Techniques. Cambridge university, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.