APA

Gas Processors Association G., . (2009). Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.

Chicago

Gas Processors Association GPA, . 2009. Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.

Harvard

Gas Processors Association G., . (2009). Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.

MLA

Gas Processors Association GPA, . Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API. 2009.