XGuitar.com: A Perfect Circle guitar tabs
- Guitar and bass tablatures sorted by album and alphabetically.
- http://www.xguitar.com/guitar-tabs/a_perfect_circle/

Epinions: Thirteenth Step
- Collection of reviews of the album.
- http://www.epinions.com/musc_mu-493825/display_~reviews

Music Frisk: A Perfect Circle
- Interview with drummer Josh Freese.
- http://www.musicfrisk.com/picture/interview/a.perfect.circle.10.21.2003.php

A Perfect Circle Forum
- Discussion of music, the band, tours, and other subjects.
- http://forums.delphiforums.com/aperfectcircle

Yahoo Groups: A Perfect Circle
- Listing of fan forums.
- http://dir.groups.yahoo.com/dir/1600545461

A Perfect Circle Lyrics
- Lyrics from the band's album.
- http://www.lyrics2.com/lyrics/a/a_perfect_circle.html

Lyrics on Demand: A Perfect Circle
- Lyrics sorted by album.
- http://www.lyricsondemand.com/a/aperfectcirclelyrics/index.html

A Perfect Circle
- Official site with tour information, a gallery, music, reviews, and band merchandise.
- http://www.aperfectcircle.com/