APA (7th ed.) Citation

PennWell MAPSearch (Firm). (2014). 2014 North America unconventional resource plays. PennWell's MAPSearch.

Chicago Style (17th ed.) Citation

PennWell MAPSearch (Firm). 2014 North America Unconventional Resource Plays. [United States]: PennWell's MAPSearch, 2014.

MLA (9th ed.) Citation

PennWell MAPSearch (Firm). 2014 North America Unconventional Resource Plays. PennWell's MAPSearch, 2014.

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