(EN) Stephen Thomas Erlewine, Backstreet Boys, su allmusic.com, AllMusic. URL consultato il 15 agosto 2021.
«In the 2000s, they took steps away from the Max Martin hitmaking sound that shot them to stardom, maturing with their fan base via adult contemporary pop on the reinventive Never Gone (2005), Unbreakable (2007), and This Is Us (2009)»