I have to write my master’s thesis in an APA format. It has to be submitted to a

I have to write my master’s thesis in an APA format. It has to be submitted to a German University. 
The thesis has to be on a case study methodology. The topic of the thesis is quite broad, so keep it in the direction of digitalization and e-commerce.
It should be legitimate, and full of citations (120-150 citations), and the research findings have to be based on interviews. At least 8-10 interviews are required for the thesis. Also, the topic of the thesis is based on the Indian market so the whole thesis should be based on the Indian market, including the interviews.