Businessweek.com is a website that has many links to business related articles/topics. bx.businessweek.com is BusinessExchange. One of the articles that I found interesting is the one on “Marketing Strategy.”
This article says what a marketing strategy is and has links to blogs and websites that detail what it is and have examples.
“A marketing strategy allows an organization to concentrate its limited resources on the greatest opportunities to increase sales and its competitive advantage.”
So, if you are interested in marketing as a part of PR business then I suggest you go check out this site: http://bx.businessweek.com/marketing-strategy?campaign_id=spnbx_mktgstrat_mktg and follow a link that interests you.