Tombs, M. (2011). US Patent No 7,930,114 Compensating for frequency change in flowmeters. United States Patent and Trademark Office.
芝加哥风格引文Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
MLA引文Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
警告：这些引文格式不一定是100％准确.