APA

American Gas Association A., American National Standard Institute A., . (2000). Diaphragm type gas displacement meters (Under 500 Cubic feet per hour capacity). Washington: American Gas Association, AGA.

Chicago

American Gas Association AGA, American National Standard Institute ANSI, . 2000. Diaphragm type gas displacement meters (Under 500 Cubic feet per hour capacity). Washington: American Gas Association, AGA.

Harvard

American Gas Association A., American National Standard Institute A., . (2000). Diaphragm type gas displacement meters (Under 500 Cubic feet per hour capacity). Washington: American Gas Association, AGA.

MLA

American Gas Association AGA, American National Standard Institute ANSI, . Diaphragm type gas displacement meters (Under 500 Cubic feet per hour capacity). Washington: American Gas Association, AGA. 2000.