(原始内容存档于2010-04-15). Niall Stokes, Into the Heart: The Stories Behind Every U2 Song. RobertHilburn, The Los Angeles Times, "Where Craft Ends and Spirit Begins (页面存档备份,存于互联网档案馆)"
30. ISBN 978-7-116-07219-0. 请检查|date=中的日期值 (帮助) Robert E. Kopp, Joseph L. Kirschvink, Isaac A. Hilburn, and Cody Z. Nash. The Paleoproterozoic snowball
Nicely. New York Times. 1995-12-03 [2015-09-19]. (原始内容存档于2015-09-25). Hilburn, Robert and, Phillips, Chuck. They Sure Figured Something Out : Jimmy Iovine