APA (7th ed.) Citation

Oskarsen, R. T. (2001). Toolkit and drillstring valve for subsea mudlift drilling. [publisher not identified].

Chicago Style (17th ed.) Citation

Oskarsen, Ray Tommy. Toolkit and Drillstring Valve for Subsea Mudlift Drilling. [Place of publication not identified]: [publisher not identified], 2001.

MLA (9th ed.) Citation

Oskarsen, Ray Tommy. Toolkit and Drillstring Valve for Subsea Mudlift Drilling. [publisher not identified], 2001.