Lua APA (7ú heag.)
Piper, D., & Murphey, C. (2004). 90 minutes in heaven: A true story of death & life. Revell.
Lua i Stíl Chicago (17ú heag.)
Piper, Don, agus Cecil Murphey. 90 Minutes in Heaven: A True Story of Death & Life. Grand Rapids, Mich: Revell, 2004.
Lua MLA (9ú heag.)
Piper, Don, agus Cecil Murphey. 90 Minutes in Heaven: A True Story of Death & Life. Revell, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.