(原始内容存档于2019-05-25). Berger, Eric. NASA's full Artemis plan revealed: 37 launches and a lunar outpost. Ars Technica. 2019-05-20 [2019-05-23]. (原始内容存档于2019-05-23)
Guide to Doctor Who. Outpost Gallifrey. (原始内容存档于2009-07-08). 引文格式1维护:显式使用等标签 (link) Shaun Lyon; et al. Doctor Who episode guide. Outpost Gallifrey. (原始内容存档于2009-07-08)