Tombs, M. (2011). US Patent No 7,930,114 Compensating for frequency change in flowmeters. United States Patent and Trademark Office.
Chicago-referens (17:e uppl.)Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
MLA-referens (9:e uppl.)Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.