A Handbook of Diction for Singers - Italian, German, French (3rd edition)

The Voice in Progress - Developing Adolescent Voices (Dan Andersen)

Varm op - En håndbog om koropvarmning, stemmetræning og sang i fællesskab

Waking & Warming up for singers and choirs (Panda van Proosdij)

How to make your choir sound awesome - The ultimate warm-up book