Izvornik: One Minute Theory. For The Choral Musc Classroom. Ronald Slabbinck. Voice sheet music. One Minute Theory. Edited by Holly Slabbinck.
Prijevod: One Minute teorija. Za zborskog Musc učionici. Glas note. One Minute teorija. Uredio Holly Slabbinck. Za zbor. glas.
