The following papers may be helpful to your topic: 

• Burchell, K., Rettie, R. and Patel, K. (2013) Marketing Social Norms: Social Marketing and the 'Social Norm Approach', Journal of Consumer Behaviour, 12, 1, pp. 1-9.
• Hoffman, D. L. and Fodor, M. (2010) Can you measure the ROI of your social media marketing?, MIT Sloan Management Review, 52, 1, pp. 41-49.
• Mangold, W. G. and Faulds, D. J. (2009) Social media: The new hybrid element of the promotion mix, Business horizons, 52, 4, pp. 357-365.

Dear Aazarah,

Here is one of my research in Social media (The Effect of Advertising Awareness on Brand Equity in Social Media), It may help you ,

Regards,

Dr. Alhaddad

Article The Effect of Advertising Awareness on Brand Equity in Social Media

Hello Aazarah.

Seems like you have an interesting problem. In your shoes I would first want to know the buying criteria of the people who are purchasing the product ... and then also look at where do they obtain information. 

May find that the brand loyal people do not think social media is a good source for information about the product.  Or perhaps they do not have access to social media so any remarks are wasted on them. 

Essentially what I am saying is that before you can say social media affects attitudes that you have to prove that there is a relationship between social media use and purchase of the product.  

You may find useful articles on Quirk's Marketing Review... and J=HubSpot has some useful research on use of social media.

Regards

Helen

How about you try . Social Media Marketing in emmerging Economies for an Article. For a journal i would recommend . international journal of online marketing research. IJOMR

Also i would like to invite you to the international conference on social media marketing  in Netherlands.ICSMM'17