Originál: Keyboard Magazine March 2015. Gregg Rolie, The Rock Organ Legend Talks Rigs, Riffs, and the Road. Organ sheet music. 66 pages.
Preklad: Keyboard Magazine 03. 2015. Gregg úlohu, The Rock Organ Legenda Talks studne, Riffs, a cesty. Organový noty. Klavírny noty. 66 strán.