10月3日祭
↑ “Korte 3 oktober feitjes: Met uitjes...” (Dutch). Dichbij. (2013年9月28日). http://www.dichtbij.nl/groot-leiden/regionaal-nieuws/artikel/3060602/korte-3-oktober-feitjes-met-uitjes.aspx 2013年10月1日閲覧。
↑ McDonald, George (2011). Frommer's Amsterdam. John Wiley & Sons. p. 33. ISBN 9780470979518. https://books.google.co.uk/books?id=RptUN4ITt2EC&pg=PA287&dq=leiden+october+3&hl=en&sa=X&ei=6o1KUrq-EMXt0gWi04FQ#v=onepage&q=leiden%20october%203&f=false
↑ Harmans, Gerard (2011). DK Eyewitness Travel Guide: The Netherlands. Dorling Kindersley. pp. 34–35. ISBN 9781405360746. https://books.google.co.uk/books?