Citation, Documentation of Sources

Q. I normally have cited at the beginning of a paraphrase. For instance, if I am using three sentences to express a scholar’s point, I would reference after the first sentence. I recently was advised that this is not correct and that the last sentence of the three is the sentence that needs the reference. Can you enlighten me on which is correct?

A. If your paraphrase is obviously a summary of this scholar’s work, and if you make it clear to readers where the summary begins and ends (and why wouldn’t you?), either location for the note callout will be fine.

[This answer relies on the 17th edition of CMOS (2017) unless otherwise noted.]