Tombs, M. (2014). US Patent No. 8,706,430: Compensating for frequency change in flowmeters. United States Patent and Trademark Office.
芝加哥风格引文Tombs, M. US Patent No. 8,706,430: Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2014.
MLA引文Tombs, M. US Patent No. 8,706,430: Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2014.
警告：这些引文格式不一定是100％准确.