I've got a paragraph in a technical paper where I summarized a chapter in a textbook.

By themselves, every sentence of the paragraph should be referenced.

But as a paragraph, I would think the paragraph would be referenced instead of each sentence.

I can't find information on this.  

Most of the time the journal or conference to which you're submitting the paper will put out style guidelines.  That should be dealt with in there.  Otherwise, follow the format for technical reports put out by the organization for whom you're employed.

Quoted: Most of the time the journal or conference to which you're submitting the paper will put out style guidelines.  That should be dealt with in there.  Otherwise, follow the format for technical reports put out by the organization for whom you're employed.

We are supposed to follow a published style guide.
I have it right here, but I can't find any reference to my particular situation.

Is your "summary" word-for-word what was written, with large chunks removed in between?  If so, you could put the whole thing in quotes, then use ellipsis periods at every deletion in order to show that stuff has been removed.  You might need to put the ellipsis periods in brackets to indicate that they were not part of the original text.  Footnoting just once at the end should work then.

That failing, ask whoever you're writing the paper for -- professor, journal, or whatever.

I'd have to go with asking the person you're writing it for.

Which format are you following?

I'm following the ACS Style Guide.  (American Chemical Society)

I sent my professor an email.