You can and probably should - but if there are typos or other changes between different versions/formats/editions of the ebook, then a search might not produce the expected result.
Calibre's viewer offers per chapter paragraph numbering which should be sufficient (and is one of the options mentioned at the APA Style Blog), but unfortunately is potentially subject to breakage if users edit the ebook and change the file boundaries for some reason (limited memory, etc).
Ultimately, universal paper and ebook citations across formats/editions, might be resolved (in the future) if text version numbering is also included within ebooks.
Last edited by Sabardeyn; 08-04-2014 at 04:27 PM.
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