APA
American Petroleum Institute A., . (2021). Specification for quality management system requirements for service spply organizations for the petroleum and natural gas industries. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 2021. Specification for quality management system requirements for service spply organizations for the petroleum and natural gas industries. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (2021). Specification for quality management system requirements for service spply organizations for the petroleum and natural gas industries. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . Specification for quality management system requirements for service spply organizations for the petroleum and natural gas industries. Washington: American Petroleum Institute, API. 2021.