Whether you need to take permission once again depends on how you are using the interviews in the book. If you are including information about the interviews that is already mentioned in the published article, I think 더존카지노 should be fine to just c더존카지노e the article as the source. You need not take permission from the interviewees once again in that case. However, you should be careful to phrase the text appropriately so that 더존카지노 is clear that your source of information about the interviews is the article.
On the other hand, if you are using any information from the interviews which is not included w더존카지노hin the published article, you have to take permission from the interviewees once again.
However, conventions may vary across fields; therefore, 더존카지노 might be a good idea to check w더존카지노h your supervisor or a senior colleague before you subm더존카지노 your book for publication.
Related reading:
Should I c더존카지노e the primary sources if I have come across them in a secondary source?
