APA
American Petroleum Institute A., . (2021). Liquid ring compressors and vacuum pumps in petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2021. Liquid ring compressors and vacuum pumps in petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2021). Liquid ring compressors and vacuum pumps in petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Liquid ring compressors and vacuum pumps in petroleum, chemical, and gas industry services. Washington: American Petroleum Institute, API. 2021.