This template gives the references for the data provided by {{Period start}} and related templates.
Usage
{{Period start ref|period name}}outputs a <ref> tag with the reference.{{Period start ref|period name|noref}}outputs a bare text of the reference without enclosing it in a <ref> tag.
Examples
{{Period start ref|Cretaceous}}→ Script error: No such module "citation/CS1".
{{Period start ref|Cretaceous|noref}}→ Script error: No such module "citation/CS1".