APA
American Petroleum Institute A., . (1996). A naturally occurring radioactive material (NORM) disposal cost study. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 1996. A naturally occurring radioactive material (NORM) disposal cost study. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (1996). A naturally occurring radioactive material (NORM) disposal cost study. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . A naturally occurring radioactive material (NORM) disposal cost study. Washington: American Petroleum Institute, API. 1996.