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~Site = http://server/strona/podstrona/

~sitecollection = http://server

~layouts 
  http://server/strona/podstrona/Lists/test/_layouts/15/ 
  {SharePointRoot}\Template\LAYOUTS\1045 
  <SharePoint:ScriptLink ID="jquery" runat="server" Name="Reservations/jquery-1.10.2.min.js" />

~siteLayouts

~siteCollectionLayouts

SiteAssets:
<SharePoint:ScriptLink Language="javascript" Name="~site/SiteAssets/Scripts/RenderCalendar.js" runat="server" Localizable="false"/>