Audition advice for singers by Opera America.
MT956 .A93 1996
The audition process: anxiety management and coping strategies by Stuart Edward Dunkel
ML3830 .D9 1989
Auditioning for the musical theatre by Fred Silver
MT820 .S657 1985
The complete professional audition: a common sense guide to auditioning for musicals and plays  by Darren R. Cohen
MT956 .C68 2005
Facing the maestro : a musician's guide to orchestral audition repertoire by Katherine Akos
ML128.O5 F295 1983
Get the callback : the art of auditioning for musical theatre by Jonathan Flom
MT956 .F56 2009
How to audition for the musical theatre: a step-by-step guide to effective preparation Rev. ed. by Donald Oliver
MT892 .O4 1988
Rock the audition : how to prepare for and get cast in rock musicals by Sheri Sanders
MT956 .S35 2011
Thank you--that's all we need for today--: a practical guide to musical theatre auditions by Mary Hammond
MT892 .H36 2009
Blogs and Websites
12 Ways to Ace Your Orchestral Audition, by Katherine Millett (first published in Strings magazine)
Auditioning for the Met Orchestra, by William Short, principal bassoonist of the Metropolitan Opera Orchestra. This article follows the audition process for two percussionists.
Auditioning TIps for Musicians, The Boston Conservatory
The College Audition Blog -- a whole blog on auditioning!
How to Pass an Orchestra Audition, by David Cohen, former principal cello of the Philharmonia Orchestra (London)
Nail your Audition, The Musician's Way Blog by Gerald Klickstein
Preparing for your Music School Audition, by Petersons (publishers of college prep books)
Douglas Yeo, trombone. Symphony Auditions: Preparation and Execution
"The Audition," by Jennie Dorris. This 2012 article in Boston magazine profiles the audition process for the Boston Symphony Orchestra through the experiences of one auditioner.
Backstage.com, the top source for musical theatre audition postings.