APA (7th ed.) Citation

American Petroleum Institute. (2013). Welding of pipelines and related facilities (Twenty-First edition.). API.

Chicago Style (17th ed.) Citation

American Petroleum Institute. Welding of Pipelines and Related Facilities. Twenty-First edition. Washington: API, 2013.

MLA (9th ed.) Citation

American Petroleum Institute. Welding of Pipelines and Related Facilities. Twenty-First edition. API, 2013.

Warning: These citations may not always be 100% accurate.