APA   Click to copy
Gross, J. (2012). The Future of Digital Reference Services. unpublished paper.

Chicago/Turabian   Click to copy
Gross, James. “The Future of Digital Reference Services.” Unpublished Paper, 2012.

MLA   Click to copy
Gross, James. “The Future of Digital Reference Services.” Unpublished Paper, 2012.

@unpublished{gross2012a,
  title = {The Future of Digital Reference Services},
  year = {2012},
  journal = {unpublished paper},
  author = {Gross, James}
}