Harkins. The Watchers in Jewish and Christian Traditions. Augsburg Fortress Publishers.
Čikaški stil citiranja (17. izdanje)Harkins. The Watchers in Jewish and Christian Traditions. Augsburg Fortress Publishers.
MLA način citiranja (9. izdanje)Harkins. The Watchers in Jewish and Christian Traditions. Augsburg Fortress Publishers.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.