Only one page for project can be linked to to a wikidata element - so, a ns0 wikisource "book" can be linked to a wikidata edition element, but can't be linked, in the same time, with the related wikidata work element. So, I can't use #property tag to get properties of work items, but only for *edition* items.

It I want to retrieve propetries of a *work* wikidata element bu #property, I've to create a specific wikisource page for the work, then to link it to wikidata work element - then using #property inside it. 

So far, the syntax to call a property of a wikidata element different from the element linked to current page seems not work.

So, I opened two *work* pages into it.wikisource, [[:it:Wikisource:Tommaso Moro (Pellico)]] and [[:it:Wikisource:Eufemio da Messina]], I linked them to Q15987095 and Q15987085, and I'm doing some test using those pages. I used nsWikisource just to avoid any possible mismatch between *works* and *editions". 

Alex