Edited by Patrick M. Liebergen. For Voice. Vocal Collection. For Two Series. Masterwork; Sacred; Secular. Book. 100 pages. Published by Alfred Publishing.

Arranged by Various. Collection. General Worship, Sacred. Collection. 84 pages. Published by Hope Publishing Company (HP.8813).

Edited by Patrick M. Liebergen. For Voice. Vocal Collection. For Two Series. Masterwork; Sacred; Secular. Book and CD. 96 pages. Published by Alfred Publishing.

(8 Contemporary Duets on Popular Holiday Songs). Edited by Andy Beck. For Voice. Book; CD; Duet or Duo; Vocal Collection. For Two Series. Christmas; Secular; Winter. 72 pages. Published by Alfred Music

(The Career Guide to Becoming a Professional Singer). By Jaime Babbitt. For Voice. Book; Method/Instruction; Technique Musicianship; Vocal Method. 264 pages. Published by Alfred Music Publishing

By Paolo Fonghetti. For 2 Voices. Published by Ut Orpheus.