See the Standard Directory of Advertising Agencies via Nexis Uni.
To search in the directory for a company/brand select A Publication from the "What are you interested in?" box. In the "Find publication" box, search for Standard Directory of Advertising Agencies. Then search a keyword (ex. a company name).
To browse entries in the directory, click Menu > All source located at the top left of the home page. In the "Search Within Sources" box search for Standard Directory of Advertising Agencies. Click the "..." icon and select Get Documents.
