Harvard:
Luce, G.H. undated, "Request for character reference", in Luce Collection, MS 6574-7, pp. 013. National Library of Australia.
APA:
Luce, G.H. (undated). Request for character reference. Luce Collection, MS 6574-7, 013. National Library of Australia.
Chicago:
Luce, Gordon H. undated. "Request For Character Reference." In Luce Collection, MS 6574-7, 013. National Library of Australia.
MLA:
Luce, Gordon H. "Request For Character Reference." Luce Collection, MS 6574-7. undated, 013.
Citation within the text:
(Luce undated)
Zotero:
Save reference in Zotero
BibTeX:
@unpublished{luce-29.013,
  author = {Luce, Gordon H.},
  title = {Request for character reference},
  year = {undated},
  booktitle  = {Luce Collection, MS 6574-7},
  publisher = {National Library of Australia},
  permission = {1},
  folder = {29},
  pages = {013},
  keywords = {correspondence|character reference},
  url = {http://purl.org/sealang/luce-29.013.pdf}
  source = {sealang},
}