Joe Kissell. Take Control of Mac OS X Backups. Version 2.0. Ithaca, NY, TidBITS Electronic Publishing, 2007. ISBN 978-0-9759503-0-2. с. 18 – 20 („The Archive“, meaning information repository, including versioning), 24 (client-server), 82 – 83 (archive file), 112 – 114 (Off-site storage backup rotation scheme), 126 – 141 (old Retrospect terminology and GUI—still used in Windows variant), 165 (client-server), 128 (subvolume—later renamed Favorite Folder in Macintosh variant). Посетен на 17 May 2019. Архив на оригинала от 2018-10-15 в Wayback Machine.
Joe Kissell. Take Control of Mac OS X Backups. Version 2.0. Ithaca, NY, TidBITS Electronic Publishing, 2007. ISBN 978-0-9759503-0-2. с. 18 – 20 („The Archive“, meaning information repository, including versioning), 24 (client-server), 82 – 83 (archive file), 112 – 114 (Off-site storage backup rotation scheme), 126 – 141 (old Retrospect terminology and GUI—still used in Windows variant), 165 (client-server), 128 (subvolume—later renamed Favorite Folder in Macintosh variant). Посетен на 17 May 2019. Архив на оригинала от 2018-10-15 в Wayback Machine.