APA

American Gas Association A., . (2007). Measurement of gas by multipath ultrasonic meters. Washington: American Gas Association, AGA.

Chicago

American Gas Association AGA, . 2007. Measurement of gas by multipath ultrasonic meters. Washington: American Gas Association, AGA.

Harvard

American Gas Association A., . (2007). Measurement of gas by multipath ultrasonic meters. Washington: American Gas Association, AGA.

MLA

American Gas Association AGA, . Measurement of gas by multipath ultrasonic meters. Washington: American Gas Association, AGA. 2007.