To find this information, I recommend the following:
1. Check academic databases: Search for the paper title or author's name in databases like JSTOR, Google Scholar, or ProQuest.
2. Contact the author directly: If you know the author's affiliation, you can try contacting them through their university or institution.
3. Search for related publications: Look for other papers by the author or on similar topics that might reference the paper in question.
If you can provide any additional details about the paper, such as its journal or conference presentation, it would be helpful in locating the publication year.