Ref:Dear Alf 01
Alf (c. ). ‘Dear Alf 01’. Official Oddworld Site Page. San Luis Obispo, California: Oddworld Inhabitants, Inc. Archived by HTTrack Website Copier/3.x (). Odd Wide Web. Oddworld Archives. Oddworld Library. Also archived by Alexa Crawls ().
Alexa Crawls 2000. Wayback Machine. San Francisco, California: Internet Archive.