Clair 2022, Chapter 30 (Search phrase "Jeff made his return to the stage playing "Engine" at six of the Holiday Surprise shows in October 2008"); Minsker 2013. Clair, Adam (2022). Endless Endless, A Lo-Fi History of the Elephant 6 Mystery (E-book). Hachette. ISBN978-0-30692-3968. Minsker, Evan (April 29, 2013). "Neutral Milk Hotel Reunite for Tour". Pitchfork. Archived from the original on May 1, 2013. Retrieved September 1, 2020.
Clair 2022, Chapter 30 (Search phrase "Jeff made his return to the stage playing "Engine" at six of the Holiday Surprise shows in October 2008"); Minsker 2013. Clair, Adam (2022). Endless Endless, A Lo-Fi History of the Elephant 6 Mystery (E-book). Hachette. ISBN978-0-30692-3968. Minsker, Evan (April 29, 2013). "Neutral Milk Hotel Reunite for Tour". Pitchfork. Archived from the original on May 1, 2013. Retrieved September 1, 2020.