APA

American Petroleum Institute A., . (2009). Welding guidelines for the chemical, oil, and gas industries. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2009. Welding guidelines for the chemical, oil, and gas industries. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2009). Welding guidelines for the chemical, oil, and gas industries. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Welding guidelines for the chemical, oil, and gas industries. Washington: American Petroleum Institute, API. 2009.