(1978). Union guide to photograph collections of the Pacific Northwest. Oregon Historical Society.
Chicago-referens (17:e uppl.)Union Guide to Photograph Collections of the Pacific Northwest. Oregon Historical Society, 1978.
MLA-referens (8:e uppl.)Union Guide to Photograph Collections of the Pacific Northwest. Oregon Historical Society, 1978.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.