Dear scholars,

I do not really want to commit unintentional plagiarism, I know that some students do it in easier way but this is my very complex question from my perspective and I hope to deliver it in understandable manner ha ha.

I cite in Harvard style in my Master's thesis but I used Public Defender's annual reports which uses citation style similar to IEEE, as you can see in the picture.

I must cite some Secondary sources from those reports and I know that I must go myself and convert or adopt them into Harvard style. However, what I did not understand is that, when I converted IEEE e.g. (456) into Harvard I received this for example (Parliament of Georgia, 2018, as cited in Public Defender of Georgia, 2020) which is very clear but next page if I find another number (490) which is again converted into (Parliament of Georgia, 2018, as cited in Public Defender of Georgia) it means that I receive Secondary sources of the same author which in my case will be "Parliament of Georgia, 2018". To distinct multiple sources in Harvard we add a,b,c, and etc. to the year but shall I do the same thing? Shall I create and add myself a,b,c and so on, to the converted Secondary sources from IEEE into Harvard?