Book chapters are peer-reviewed and should be considered when compiling sources.
Check out some of the following databases:
Isolate your research to scholarly business & communication literature!
These databases index trade publications and peer-reviewed literature. Some of the articles will be available full-text while others will not. Select the full-text option on the left hand side of the screen as a limiter.
Try searching Subject Headings:
Brand name product
Brand differentiation
Brand Choice
Physical Distribution
Advertising Material Distribution Services
Pricing
Sales promotion
Special events -- Marketing
Customer loyalty
Consumer behavior
Social media in marketing
Endorsements in advertising
Celebrities
Brand Extension
Brand identification