↑HOROWITZ, Hal. Billy Gibbons and the BFGs: Perfectamundo [online]. American Songwriter, 2015-10-22 [cit. 2018-07-25]. Dostupné v archivu pořízeném dne 2016-03-05. (anglicky)
↑CANTOR-NAVA, Judy. ZZ Top Guitarist Billy Gibbons to Release Cuban-Flavored Solo Album 'Perfectamundo' in October [online]. Billboard, 2015 [cit. 2018-07-25]. Dostupné online. (anglicky)