Originál: Diatonic Theory & Harmony. Composed by Doug Doppler. Guitar sheet music. Diatonic Theory & Harmony. Guitar 411 presents.
Preklad: Diatonic Teória. Gitara noty. Diatonic Teória. Pre gitaru. Gitara. Zapojený nástroje. 2 DVDs. Published by Carisch Edition. M7.ML-1660.