APA

American Petroleum Institute A., . (2013). Security risk assessment methodology for the petroleum and petrhochemical industries. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2013. Security risk assessment methodology for the petroleum and petrhochemical industries. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2013). Security risk assessment methodology for the petroleum and petrhochemical industries. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Security risk assessment methodology for the petroleum and petrhochemical industries. Washington: American Petroleum Institute, API. 2013.