APA
American Petroleum Institute A., . (2009). Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2009. Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2009). Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API. 2009.