Re we taking it too far by blaming fast food restaurants for obesity? When is it individual respomsibility and when is it appropriate to place blame?

I need 7 sources one from article, book, journals, and the rest of it could be from anything..and I just wanna tell you that English is not my native language so can you write with easy words..another thing I want you to use these two articles in my research please

Source: Journal of Paediatrics & Child Health. Feb2012, Vol. 48 Issue 2, p103-105. 3p. 1 Color Photograph.
Source: Journal of Public Health Policy. 2007, Vol. 28 Issue 2, p238-248. 11p.