APA

American Petroleum Institute A., . (2002). Safe welding, cutting, and other hot work practices in the petroleum and petrochemical industries. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2002. Safe welding, cutting, and other hot work practices in the petroleum and petrochemical industries. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2002). Safe welding, cutting, and other hot work practices in the petroleum and petrochemical industries. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Safe welding, cutting, and other hot work practices in the petroleum and petrochemical industries. Washington: American Petroleum Institute, API. 2002.