APA Citation

(2010). The Oil & gas directory 2011 (41st ed.). Houston: The Oil & Gas Directory.

Chicago Style Citation

The Oil & Gas Directory 2011. 41st ed. Houston: The Oil & Gas Directory, 2010.

MLA Citation

The Oil & Gas Directory 2011. 41st ed. Houston: The Oil & Gas Directory, 2010.

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