APA
American Petroleum Institute A., . (2022). Recommended practice for guarding of pumping units. 4Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2022. Recommended practice for guarding of pumping units. 4Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2022). Recommended practice for guarding of pumping units. 4Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Recommended practice for guarding of pumping units. 4Washington: American Petroleum Institute, API. 2022.