APA

American Petroleum Institute A., . (2018). Validation of safety and shutdown valves for sandy service. Washington: American Petroleum Institute, API.

Chicago

American Petroleum Institute API, . 2018. Validation of safety and shutdown valves for sandy service. Washington: American Petroleum Institute, API.

Harvard

American Petroleum Institute A., . (2018). Validation of safety and shutdown valves for sandy service. Washington: American Petroleum Institute, API.

MLA

American Petroleum Institute API, . Validation of safety and shutdown valves for sandy service. Washington: American Petroleum Institute, API. 2018.