There exists a real problem in my research work, I am working in a field of absolutely controversial discussion about current historical questions. I intend to enrich published books or book chapters with figures that deliver evidence on the first glance. But the help center says: This doesn't work, the system allows to do so only with articles and conference papers. So I am constrained to write "article" - and not chapter - in the biographical reference scheme - but this is confusing for quoting. Is there any advice to manage the problem?