APA Style
Service, P, E. (1971).
Lessons in Well Servicing and Workover: Lesson 8 – Well Cleanout and Repair Methods .
Texas:
Petroleum Extension Service.
MLA Style
Service, Petroleum, Extension.
"Lessons in Well Servicing and Workover: Lesson 8 – Well Cleanout and Repair Methods".
Texas:
Petroleum Extension Service,
1971.
Teknik.