This has been bothering me for a while. When you put a quote in the middle of your sentance, is said quote supposed to be a sentance in its own right or should it be treated as part of the sentance, for example;
Verses;
I can’t find a cite for that particular arrangement, but my inner copy editor says do it this way:
Replacing a full stop with a comma when the overall sentence continues past the quote is standard. That first comma is probably optional.
“Ending a sentence other than a question or exclamation with a period (full stop) is standard,” he explained. 
In the example you gave, I would use no punctuation other than the period at the end. But this is an exceptional situation. Ordinarily, a quotation not ending the sentence in which it is contained will take a comma at the end of the quoted text, within the quotation marks, the comma and close-quotes together signifying that the quotation is ended but the sentence it is included in continues.
My Elements of Style agrees.