About.com - Once Upon a Time in America: Review by Ivana Redwine (positive) emphasizing DVD production values, rating.
Cinebooks Database - Once Upon a Time in America: Unsigned review (positive), rating.
GoneMovie.com: Once Upon a Time in America: Synopsis, trivia, and multimedia.
IMDb - Once Upon a Time in America: Cast, credits, production information.
Sergio Leone A Fistful of Leone: Once Upon a Time in America: Review and synopsis. Includes sound clips and music from the movie.