I'm writing my Thesis and I found a brilliant book that helps me write it in a coherent manner. Consider this:
The author, Smith, talks about Approach XYZ and writes:
XYZ is about ..., first used by [1], that has more or less four common themes, theme A [2], theme B [3], theme C [4] and theme D [5].
So in my Thesis i say.
We will align with XYZ. As explained by Smith [0] (For whom we assign the reference [0] for the purpose of this question), there are four themes, and they are relevant to our study because bla bla bla. [2][3][4][5].
So my question is this.
Do I need to cite everyone? Or would citing Smith, who in turn cited everyone be sufficient?
Or is there no clear cut line? Perhaps I only need to cite those themes where I go beyond what Smith writes in his book or how they are affecting me directly?