APA   Click to copy
Gross, J. (2012). The Philadelphia Award for 1960: Allston Jenkins. Historical Society of Pennsylvania.

Chicago/Turabian   Click to copy
Gross, James. “The Philadelphia Award for 1960: Allston Jenkins.” Historical Society of Pennsylvania, 2012.

MLA   Click to copy
Gross, James. The Philadelphia Award for 1960: Allston Jenkins. Historical Society of Pennsylvania, 2012.

@unpublished{gross2012a,
  title = {The Philadelphia Award for 1960: Allston Jenkins},
  year = {2012},
  publisher = {Historical Society of Pennsylvania},
  author = {Gross, James}
}