Associations

Advertising Research Foundation
American Association of Advertising Agencies
American Business Media
American Marketing Association
Association of National Advertisers
Audit Bureau of Circulations
BPA International
Business Marketing Association
International Federation of the Periodical Press
Internet Advertising Bureau
Magazine Publishers of America
Periodical Publishers Association
Society of National Association Publications
Western Publications Association

Directories

British Rates and Data
Canadian Advertising Rates and Data
Gale Directory of Publications and Broadcast Media
National Directory of Magazines by Oxford Communications
PubList
Standard Directory of Advertisers and Standard Directory of Advertising Agencies
Standard Rate & Data Service
Ulrich's International Periodicals Directory

Industry Publications

Advertising Age
Adweek, Brandweek, Mediaweek
Folio: The Magazine for Magazine Management
Media Central
min Magazine