Originál: One Minute Theory. For The Choral Musc Classroom. Ronald Slabbinck. Voice sheet music. One Minute Theory. Edited by Holly Slabbinck.
Preklad: Teória One Minute. Pre zborového MUSC triede. Hlas noty. Teória One Minute. Zmenené Holly Slabbinck. Pre zboru. hlas.