APA   Click to copy
Gross, J. (2013). A Useful Resource for Tracing Immigrants Who Entered the US Through Ellis Island. Chronicles, 30, 6–7.

Chicago/Turabian   Click to copy
Gross, James. “A Useful Resource for Tracing Immigrants Who Entered the US Through Ellis Island.” Chronicles 30 (2013): 6–7.

MLA   Click to copy
Gross, James. “A Useful Resource for Tracing Immigrants Who Entered the US Through Ellis Island.” Chronicles, vol. 30, 2013, pp. 6–7.

@article{gross2013a,
  title = {A Useful Resource for Tracing Immigrants Who Entered the US Through Ellis Island},
  year = {2013},
  journal = {Chronicles},
  pages = {6--7},
  volume = {30},
  author = {Gross, James}
}