Coenraads, R. R. (2007). Geologica: : Earth's dynamic forces. Millennium House.
Chicago Edition CitationCoenraads, Robert R. Geologica: : Earth's Dynamic Forces. Millennium House, 2007.
Cita MLACoenraads, Robert R. Geologica: : Earth's Dynamic Forces. Millennium House, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.