Παραπομπή APA

Ford, D., & Williams, P. (2007). Karst hydrogeology and geomorphology. John Wiley.

Παραπομπή Chicago Style

Ford, Derek, και Paul Williams. Karst Hydrogeology and Geomorphology. Chichester: John Wiley, 2007.

Παραπομπή MLA

Ford, Derek, και Paul Williams. Karst Hydrogeology and Geomorphology. John Wiley, 2007.