APA引文

Tombs, M. (2015). European Patent EP1989517: Compensating for frequency change in flowmeters. European Patent Office.

Chicago Style (17th ed.) Citation

Tombs, M. European Patent EP1989517: Compensating for Frequency Change in Flowmeters. European Patent Office, 2015.

MLA引文

Tombs, M. European Patent EP1989517: Compensating for Frequency Change in Flowmeters. European Patent Office, 2015.

警告：這些引文格式不一定是100％准確.