APA
(2015). Heat treatment services -Batch type for equipment used in the petreleum and natural gas industry. Washington: American Petroleum Institute, API.
Chicago
2015. Heat treatment services -Batch type for equipment used in the petreleum and natural gas industry. Washington: American Petroleum Institute, API.
Harvard
(2015). Heat treatment services -Batch type for equipment used in the petreleum and natural gas industry. Washington: American Petroleum Institute, API.
MLA
Heat treatment services -Batch type for equipment used in the petreleum and natural gas industry. Washington: American Petroleum Institute, API. 2015.