The Onion AV Club: Happiness
- Short review which makes comparisons between other Todd Solondz films and looks at plot and director's style.
- http://avclub.theonion.com/review.php?review_id=503

IMDb: Happiness (1998)
- Includes cast and crew, user comments and rating, plot summary, memorable quotes, soundtrack listing, awards and external reviews.
- http://us.imdb.com/title/tt0147612/

eFilmCritic: Happiness
- Various reviews and ratings from different critics on this site.
- http://efilmcritic.com/hbs.cgi?movie=432

Allwatchers: Happiness
- Analysis of the characters, plot, theme, and structure of the film, and links to similar movies.
- http://www.allwatchers.com/Topics/Info_6338.asp

Apollo Leisure Guide
- Review of the controversial film about dysfunctional sexuality.
- http://apolloguide.com/mov_revtemp.asp?cid=1117

Guardian Unlimited Film: Happiness
- Includes plot and interview with the director.
- http://www.filmunlimited.co.uk/Feature_Story/Guardian/0,4120,37590,00.html