(45 Accompanied Vocal Warm-Ups That Teach Technique). By and arr. Andy Beck. Choir Secular. Book; CD; Choral Method; Method/Instruction; Reproducible. 120 pages. Published by Alfred Music Publishing

Building Beautiful Voices - Director's Edition (A concise, yet comprehensive study of vocal technique for the choral rehearsal or private instruction). By Paul Nesheim. Arranged by Weston Noble. Director's score. Published by Roger Dean Publishing

By Keyte & Parrot. For Choral Collection (Paper). Published by Oxford University Press.