Cita APA (7a ed.)

Mittwed.e, S. K. (1989). Ultramafic rocks of the Appalachian Piedmont. The Geological Society of America.

Cita Chicago Style (17a ed.)

Mittwed.e, Steven K. Ultramafic Rocks of the Appalachian Piedmont. Nueva York: The Geological Society of America, 1989.

Cita MLA (8a ed.)

Mittwed.e, Steven K. Ultramafic Rocks of the Appalachian Piedmont. The Geological Society of America, 1989.