This is controlled by the citation style that you use. What style are you using? Note that if you’re using APA style, the publisher location is no longer included as of seventh edition
Chicago 18 says that the place of publication is no longer required. It does NOT say that the place of publication is forbidden. For those of us who do require the place of publication for our work, this should be a switchable option. This goes for everything that Chicago now says is not required. In no case does Chicago say these things are prohibited.
Why?
This goes for everything that Chicago now says is not required. In no case does Chicago say these things are prohibited.