Humbert, N., & Penzel, W. (1999). Robert Lax: Why should I buy a bed when all that I want is sleep? ; A Chamber-Film with Robert Lax / by Nicolas Humbert & Werner Penzel. Pociao's Books.
Lua i Stíl Chicago (17ú heag.)Humbert, Nicolas, agus Werner Penzel. Robert Lax: Why Should I Buy a Bed When All That I Want Is Sleep? ; A Chamber-Film with Robert Lax / by Nicolas Humbert & Werner Penzel. Bonn: Pociao's Books, 1999.
Lua MLA (8ú heag.)Humbert, Nicolas, agus Werner Penzel. Robert Lax: Why Should I Buy a Bed When All That I Want Is Sleep? ; A Chamber-Film with Robert Lax / by Nicolas Humbert & Werner Penzel. Pociao's Books, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.