An article on Iran's president coming to New York, and his upcoming visit to Columbia University attributed three different sources of information. These are: a 60 minutes interview with Ahmadinejad, the official IRNA news agency, and an interview on Al-Jazeera television. Most of the article is written through the personal experience of the writer and her speculation and opinion. It is when quotes are used in the article that sources are referred to. The attribution is fairly clear and credible and therefore effective.