↑McCall, Douglas (2014). Monty Python: A Chronology, 1969-2012, ed ed. Jefferson, North Carolina: McFarland & Company, Inc. pp. 30–31. ISBN978-0-7864-7811-8 –透過Google Books. The album [...] is originally released as a three-sided record; that is, one of the sides has two parallel sets of grooves, each containing a different set of tracks.