Tombs, M. (2015). European Patent EP1989517: Compensating for frequency change in flowmeters. European Patent Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTombs, M. European Patent EP1989517: Compensating for Frequency Change in Flowmeters. European Patent Office, 2015.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTombs, M. European Patent EP1989517: Compensating for Frequency Change in Flowmeters. European Patent Office, 2015.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.