X - MPAA Movie Rating for Adults Only by

What do movie ratings mean? - Child & Family Development

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

FSM Board: Films That Received an X Rating in the U.S.

Restricted rating, Rating System Wiki

This Film is Not Yet Rated

The Problematic MPAA – The Shaker Bison

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

original version of the movie ratings poster before the X rating was changed to NC-17 : r/RedditDayOf

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

What changes would you like to see to the MPAA rating system? - Quora