APA (7th ed.) Citation

Não informado. (1944). Drilling contractor. American Association of Oilwell Drilling Contractors.

Chicago Style (17th ed.) Citation

Não informado. Drilling Contractor. Dallas, Tex: American Association of Oilwell Drilling Contractors, 1944.

MLA (8th ed.) Citation

Não informado. Drilling Contractor. American Association of Oilwell Drilling Contractors, 1944.

Warning: These citations may not always be 100% accurate.