APA
American Gas Association A., . (1998). Measurement of gas by multipath ultrasonic meters. Arlington: American Gas Association, AGA.
Chicago
American Gas Association AGA, . 1998. Measurement of gas by multipath ultrasonic meters. Arlington: American Gas Association, AGA.
Harvard
American Gas Association A., . (1998). Measurement of gas by multipath ultrasonic meters. Arlington: American Gas Association, AGA.
MLA
American Gas Association AGA, . Measurement of gas by multipath ultrasonic meters. Arlington: American Gas Association, AGA. 1998.