APA
American Petroleum Institute A., . (2022). Specification for pumping units. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2022. Specification for pumping units. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2022). Specification for pumping units. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Specification for pumping units. Washington: American Petroleum Institute, API. 2022.