In order to cite "Valkyrie Conspiracy" as a source for a school essay or project, please consult the writing style manual specified by your school (APA, MLA, etc.) regarding citation of Internet sources. For MLA, proper citation format would be something like this:

    Schrader, Helena P.  "1938: The First Coup Attempt."  Valkyrie Conspiracy.  April 23, 2008. [from "Last updated:" on the left bottom of the article] Accessed 8 May 2008 [date you accessed the article] <http://valkyrie-plot.com/1938.html>.

See "How do I document sources from the Web in my works-cited list?" on the official MLA website for more information.