Standard Directory of Advertising Agencies. Information Desk1 Reference HF5805.S781 2005. National advertising agency information: specialization, officers, account executives, approximate annual billings, percent by media, account names.
Advertising World: The Ultimate Communications Directory (from the University of Texas). Online directory of ad agencies.
Adweek –
provides access to directories of advertising agencies by major category, best spots, annual Agency Report Cards and more. American Association of Advertising Agencies (AAAA)
Represents US agencies; offers broad range of services, information, and expertise regarding the ad agency business.
Marketer's Portal
Advertising resources including agencies, associations, branding information, publications and more.
Wetfeet insider Guide to Careers in Advertising and Public Relations