APA

American Petroleum Institute A., . (1979). The API well number and standard state and county numeric codes including offshore waters. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 1979. The API well number and standard state and county numeric codes including offshore waters. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (1979). The API well number and standard state and county numeric codes including offshore waters. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . The API well number and standard state and county numeric codes including offshore waters. Washington: American Petroleum Institute, API. 1979.