APA

American Petroleum Institute A., . (2013). Open die shaped forgings for use in the petroleum and natural gas industry. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2013. Open die shaped forgings for use in the petroleum and natural gas industry. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2013). Open die shaped forgings for use in the petroleum and natural gas industry. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Open die shaped forgings for use in the petroleum and natural gas industry. Washington: American Petroleum Institute, API. 2013.