The best place to start is the Business & Economics Databases page. Here you will find the list of ASU Library business database organized by the type of information.
The best databases for articles on marketing are:
ABI/Inform. Choose the TOPIC tab to narrow your search to advertising and marketing items. The Suggested Topics links will also help you refine your search. Once you have found an article that is exactly what you need try the "Find more documents like this" option listed in the box on the right of the complete record to find more articles on a similar track.
Business Insghts: Global. This database defaults to a Company name search but you can also do searches by keyword. To do the best keyword searches in this database, use the ADVANCED Search and select the Subject term from the drop down list. When you find an article you like, use the complete record to look at the other subject terms listed in the box on the left.