Advertising Age: www.adage.com
Advertising Federation of America: www.aaf.org
Advertising Federation of Columbus (Ohio): www.adfedcolumbus.org
Advertising Media Internet Center: www.amic.com
Advertising Media Resource Center: www.admedia.com
Advertising News Service: www.newspage.com
Advertising Research Foundation: www.arfsite.org
American Association of Advertising Agencies: www.aaaa.org
American Demographics: www.demographics.com
Arbitron Company: www.arbitron.com
Association of National Advertisers: www.ana.net
Audit Bureau of Circulation: www.auditbureau.org
Broadcast & Cable: www.broadcastingcable.com
Competitive Media Reports: www.cmr.com
Electronic Media: www.emonline.com
E Marketer Newsletter: www.emarketer.com
Forrester Research: www.forrester.com
Jupiter Communications: www.jup.com
Magazine Publishers of America: www.magazine.org
Media Central: www.mediacentral.com
MediaLife Magazine: www.medialifemagazine.com
Media Metrix: www.mediametrix.com
MediaWeek: www.mediaweek.com
Mediapost Monitor: www.mediapost.com
Myers Report: www.myersreport.com
National Association of Broadcasters: www.nab.org
National Cable Television Association: www.ncta.com
Newspaper Association of America: www.newspaperlinks.com
Newsweek Media Research Index: www.vmr.com
Nielsen Media Research: www.nielsenmedia.com
Nielsen Net Ratings: www.nielsen-netratings.com
Outdoor Advertising Association of America: www.oaaa.org
Radio Advertising Bureau: www.rab.com
Roper Starch Worldwide: www.roper.com
Simmons Market Research Bureau: www.smrb.com
Statistical Research Inc: www.sriresearch.com
Television Bureau of Advertising: www.tvb.org