APA (7th ed.) Citation

Society of Petroleum Engineers (U.S.). SPE membership directory. Society of Petroleum Engineers.

Chicago Style (17th ed.) Citation

Society of Petroleum Engineers (U.S.). SPE Membership Directory. Richardson, TX: Society of Petroleum Engineers.

MLA (9th ed.) Citation

Society of Petroleum Engineers (U.S.). SPE Membership Directory. Society of Petroleum Engineers.

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