User:Erat616/sandbox

@misc{ wiki:xxx,
  author = "Wikibooks",
  title = "Introduction to Information Technology/Relational Databases --- Wikibooks{,} The Free Textbook Project",
  year = "2017",
  url = "\url{https://en.wikibooks.org/w/index.php?title=Introduction_to_Information_Technology/Relational_Databases&oldid=3177544}",
  note = "[Online; accessed 21-January-2019]"Cite error: There are <ref> tags on this page without content in them (see the help page).