An SCI journal listing is no good. If your journal exists on that list, you're laughing. Provide a copy of the referees' reports. Several refereed journals have information to the effect that the journal is refereed, usually somewhere close to the back or the front of each journal issue. If so, please provide a copy.
Several journals have Web pages with information to the effect that the journal is refereed.
If so, please print a copy. If the above fail, then we shall have to be creative. Ars Combinatoria Dear Phil, I have been asked to send you a message about Ars Combinatoria. AC is definitely a fully refereed journal. If you do not want to download them, please ask Pauline Wilson for a copy.