Abbey Ghost Hunters  (U.K)
After Dark Paranormal Investigations
Alabama Ghost Research Society  (Alabama)
All About Ghosts
American Association of Paranormal Investigations
American Association of Paranormal Research
Advanced Ghost Hunters of Seattle-Tacoma
American Ghost Society
American Society for Psychical Research  (New York)
Arizona Paranormal Investigations  (Arizona)
Arkanasas Paranormal Investigations  (Arkanasas) 
Aware Foundation: Paranormal Research
Bay Area Paranormal Investigations  (California)
Beaver County Ghost Hunters  (Pennsylvania)
Berkshire Paranormal  (Massachussetts)
C.C.P.I. Paranormal Investigations  (Colorado and Utah)
Cape and Islands Paranormal Research Society  (Massachussetts)
Central Arkansas Society for Paranormal Research  (Arkansas)
Central Berkshire Ghost Hunters
Central European Paranormal Investigations  (Bavaria, Germany)
Central New York Ghost Hunters  (New York State)
Central Ohio Ghost Squad  (Lancaster, Ohio)
Central Ohio Paranormal  (Ohio)
Chippewa Valley Paranormal Investigations (Chippewa Falls Wisconsin)
Circle City Paranormal  (Indianapolis, Indiana)
Coast to Coast A.M Paranormal Radio With George Noorey
Connecticut Paranormal Investigators  (Connecticut)
Connecticut Paranormal Research Team  (Connecticut)
Corpus Christi Spook Central (Corpus Christi Texas)
Crossroads Paranormal
D&A Paranormal Investigators (New Jersey)
Daytona Beach Paranormal Research Group, INC (Daytona Beach Florida)
Delaware County Paranormal Research (Delaware County, Pennsylvania)
Delta Group Paranormal Investigators (Norwalk)
East Central Wisconsin Paranormal Investigations (Wisconsin)
East Coast Hauntings Organization (Bath North Carolina)
Eastern Paranormal Research (Maryland) 
Engaging Spirits Arkansas Paranormal Investigations(Arkansas)Maggies light
Ghosts Caught on Tape
MPG (Maryland)
Pennsylvania Bureau of Paranormal Research
Washington street books (Havre de Grace, MD)