National Water Well Association. (1963). Ground Water. Water Well Journal Publishing.
Chicago-referens (17:e uppl.)National Water Well Association. Ground Water. Dublin, Ohio: Water Well Journal Publishing, 1963.
MLA-referens (8:e uppl.)National Water Well Association. Ground Water. Water Well Journal Publishing, 1963.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.