Don’t Abbreviate Page Numbers with "f." or "ff."
Although less common in English-language styles, some citation styles use "f." or "ff." to denote following pages in a citation. For example, if you cite a section of a text spanning several pages, instead of writing 17-21 you might write 17 f.
In the Word Add-In, it's important to always enter the full page range and not to enter page ranges with "f." or "ff." If your citation style uses these abbreviations, they will be applied automatically.