Ford, D., & Williams, P. (2007). Karst Hydrogeology and Geomorphology.
Chicago Edition CitationFord, Derek, i Paul Williams. Karst Hydrogeology and Geomorphology. NewYork, JhonWiley & Sons, 2007.
Cita MLAFord, Derek, i Paul Williams. Karst Hydrogeology and Geomorphology. 2007.
Atenció: Aquestes cites poden no estar 100% correctes.