Best practices for quoting resources that don't have page numbers

I've been using "n.p." which some say means "need page", others say means "no page" (which makes no sense, since the citation does have a page, but we just don't know it). It has always been accepted by my professors.

Personally, I think that we need something like "Kindle position" for Logos resources, so that we can cite more exactly. I once made a suggestion about this on the previous suggestions site, but it never gained any traction.

Michel Pauw said:

What are your best practices for quoting digital resources in Logos that do not have page numbers? 

My recommended best practice is to follow the style guide for whatever citation style you are using. I have yet to encounter one that does not have instructions for handling non-paginated ebooks.

Sometimes it's possible to find the page number on Google Books, or in the Amazon "Look inside" preview., or on archive.org.

It it's not on any of these, I have a list of sites that I'm not gonna name here that provide a huge number of books illegitimately. (If I've already paid for a book, I don't consider it immoral to download a bootleg copy for the sole purpose of getting the page number.)

Sometimes it's also helpful just to google for a few words of the citation ("exact words" on Google Advanced Search).

If I still can't find it (which still happens all the time), then I use "n.p."

David Ames said:

What about Paragraph yyy of Chapter xxx ?

Not quite an option if you have to follow a style guide.