Tombs, M. (2011). US Patent No 7,930,114 Compensating for frequency change in flowmeters. United States Patent and Trademark Office.
Čikaški stil citiranja (17. izdanje)Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
MLA način citiranja (9. izdanje)Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
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