APA

American Petroleum Institute A., . (2007). Guidance document for the development of a safety and environmental management system for onshore oil and natural gas production operations and associated activities. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2007. Guidance document for the development of a safety and environmental management system for onshore oil and natural gas production operations and associated activities. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2007). Guidance document for the development of a safety and environmental management system for onshore oil and natural gas production operations and associated activities. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Guidance document for the development of a safety and environmental management system for onshore oil and natural gas production operations and associated activities. Washington: American Petroleum Institute, API. 2007.