↑(Inggris)Vincent Di Fate di Internet Speculative Fiction Database (ISFDB). Retrieved 2013-03-21. Select a title to see its linked publication history and general information. Select a particular edition (title) for more data at that level, such as a front cover image or linked contents.
↑""Science Fiction Hall of Fame"". Diarsipkan dari asli tanggal July 21, 2011. Diakses tanggal 2011-07-21. . [Quote: "EMP is proud to announce the 2011 Hall of Fame inductees:..."]. May/June/July 2011. EMP Museum (empmuseum.org). Archived 2011-07-21. Retrieved 2013-03-19.
