The general AP style numerical rule is to spell out numbers of nine or lower and use digits for those higher than 10. That’s ...

CU Boulder uses The Associated Press Stylebook as our official style guide. However, we depart from AP style in a few cases. Please check our list of those exceptions. This guide provides ...

Writers and editors should adhere to our house style for all written communications. Our house style, a customized version of AP style, can be found here. Please note: This website can only be ...