APA

American Petroleum Institute A., . (1982). Controlling weld hardness of carbon steel refinery equipment to prevent environmental cracking. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1982. Controlling weld hardness of carbon steel refinery equipment to prevent environmental cracking. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1982). Controlling weld hardness of carbon steel refinery equipment to prevent environmental cracking. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Controlling weld hardness of carbon steel refinery equipment to prevent environmental cracking. Washington: American Petroleum Institute, API. 1982.