I had submitted a paper in a journal whose impact factor was .78 according to Thompson Reuters citation reports in 2013. My paper got accepted in that journal and was published in 2014. The journal did not receive any impact factor for the year 2014. Sometimes I have to mention the impact factor of my papers with them but I do not know how to find the impact factor for this particular journal (It had impact factor when I submitted but when published it did not receive any impact factor). Please guide me what impact factor should I use for my above mentioned paper.
I have same question for change in the impact factor of a journal from submission time to publication time. Thank you.