APA

American Petroleum Institute A., . (2013). Manual of petroleum measurement standards. Chapter 21- Flow measurement using electronic metering systems. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2013. Manual of petroleum measurement standards. Chapter 21- Flow measurement using electronic metering systems. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2013). Manual of petroleum measurement standards. Chapter 21- Flow measurement using electronic metering systems. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Manual of petroleum measurement standards. Chapter 21- Flow measurement using electronic metering systems. Washington: American Petroleum Institute, API. 2013.