Effects of social media on business marketing

I need an annotated bibliography supporting my topic “Effects of social media on business marketing” -“Social media has a positive impact on the businesses marketing”.
This is the instructions I was given:In this activity you will write and upload an annotated bibliography about your topic. An annotated bibliography is a list of references with annotations following each reference citation. Annotations are notes that summarize this reference by covering (a) the focus/scope of a reference, (b) the argument it makes, and (c) the evidence  it offers to support this argument, (d) how you can use this reference in your paper. You need to include at least 7 references in your annotated bibliography.

I will also attach examples of how this annotated bibliography should look like.