APA

American Petroleum Institute A., . (1997). Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1997. Manual of petroleum measurement standards. Chapter 14- Natural gas fluids measurement. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1997). 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. 1997.