Oriģināls: In Tune Magazine February 2015. Pentatonix Bringing A Cappella Into the Pop Spotlight. In Tune Magazine February 2015 in Tune.
Tulkojums: Walk the Moon, Aloe Blacc, Music News, and More. 46 pages. Publicējusi Hal Leonard. HL.77772161. Decorate Your Music with Ornaments.