The punctuation at the end of a quotation goes inside the quotation marks:
   “. . . and dedicated to the proposition that all men are created equal.”

When several words of a quote are missing, use ellipses without ending punctuation:
   “. . . and dedicated to the proposition that all men . . .”

When the last word of a quote is missing, use ellipses and the ending punctuation:
   “. . . and dedicated to the proposition that all men are created . . . .”

When a sentence ends with an abbreviation, do not add an extra period:
   The movie starts at 7 p.m.

When a question ends with an abbreviation, add the question mark:
  Does the sun rise today before 6 a.m.?

When a sentence ends with an acronym, add the ending punctuation:
   He had been an employee of NASA.

When an entire sentence is enclosed in parentheses, place the punctuation inside:
   (He had hoped it would be kept a secret.)

When the end of a sentence is enclosed in parentheses, place the punctuation outside:
   He had written a diary (which he had hoped would be kept private).