Theodore Roosevelt (2015). “Theodore Roosevelt on Bravery: Lessons from the Most Courageous Leader of the Twentieth Century”, p.57, Skyhorse Publishing, Inc.
"Interview: Melissa Rosenberg On New Moon, Eclipse, And Breaking Dawn's Potential Mpaa Rating". Interview with Laremy Legel, www.mtv.com. April 4, 2010.
"Not Lost but Gone Before" (ca. 1850). Burton E. Stevenson, Home Book of Quotations, and the Oxford Dictionary of Quotations trace "Not lost, but gone before" and similar expressions to Seneca, St. Cyprian, and Matthew Henry.