APA (7th ed.) Citation

American Petroleum Institute. (2005). Recommended practice for field testing of oil-based drilling fluids (4th ed.). American Petroleum Institute.

Chicago Style (17th ed.) Citation

American Petroleum Institute. Recommended Practice for Field Testing of Oil-based Drilling Fluids. 4th ed. Washington, D.C.: American Petroleum Institute, 2005.

MLA (9th ed.) Citation

American Petroleum Institute. Recommended Practice for Field Testing of Oil-based Drilling Fluids. 4th ed. American Petroleum Institute, 2005.