Hoedt, A., & Geissler, H. (2015). Once a year: Axel Hoedt ; with an essay by Heike Geissler (Second edition.). Steidl.
Lua i Stíl Chicago (17ú heag.)Hoedt, Axel, agus Heike Geissler. Once a Year: Axel Hoedt ; with an Essay by Heike Geissler. Second edition. Göttingen: Steidl, 2015.
Lua MLA (8ú heag.)Hoedt, Axel, agus Heike Geissler. Once a Year: Axel Hoedt ; with an Essay by Heike Geissler. Second edition. Steidl, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.