I'm writing a thesis in English (I'm from Germany) in which I'll use a graphic from a book that I modified just a little bit. How do write it correctly?
- see [source], slightly modified.
- slightly modified from [source].
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I would use a footnote. At the bottom of the page, I would explain briefly that although I have modificated the graphic, it was taken from: (cite source).
I'm Spanish but I always work using English. I have never written a thesis, though.