X - MPAA Movie Rating for Adults Only by

Entertainment: MPAA: Alphabet Soup

History

The evolution of movie ratings, News for Fenton, Linden, Holly MI

8 Theatrical Films You May Not Know Were Originally Rated X – Silver Screen Guide

Motion Picture Association - Wikipedia

The movie ratings G, PG, PG-13, and R are obvious in why they are different. But what are the difference between NC-17, X, and Unrated? - Quora

How to Understand Movie Ratings: 5 Steps (with Pictures) - wikiHow

Mpaa rating review by Horseboy223 on DeviantArt

Rating Bumper - Rated X (Adults Only)

X-Rated!

Best X-Rated Movies: Adult Movies That Are Actually Good - Thrillist

57 Percent of All Films Got R Rating in Last 50 Years, MPAA Says - TheWrap

What do movie ratings mean? - Child & Family Development

The Best X-Rated and NC-17-Rated Movies in History

List of NC-17 rated films - Wikipedia