Image source: Pixabay
APA
Gillis, C. E. Section of City of Arcata, Cal. [digital image]. HCC Photo Collection (Arcata, 1999.07.0011). Humboldt State University Library, Arcata, CA.
Chicago
Gillis. Section of City of Arcata, Cal. January 5, 1907. HCC Photo Collection, Humboldt State University Library, Arcata, CA. Accessed September 25, 2017 from http://library.humboldt.edu/humco/holdings/photocoll.htm.
MLA
Gillis, C. E. Section of City of Arcata, Cal. HCC Photo Collection, January 5, 1907, Humboldt State University Library, Arcata, California.
APA
Author, A. A. (Year, Month Day). Title of photograph. [Description of photograph]. Name of Collection (Call number, Box number, File name or number, etc). Humboldt State University Library, Arcata, CA.
Chicago
Author's Last Name, First Name (if given). Title of Photograph(if given). Photograph. Item # or Box/Folder # or Folder Name. Collection Name. Humboldt State University Library, Arcata, CA. (If you access the image from a digital collection, add the date of access and the url)
MLA
Author. Title of Photograph*. Title of Container, Other contributors, Version, Publisher, Publication Date, Humboldt State University Library, Arcata, California.
*Note: In some instances, your title of source will be in quotation marks as opposed to italics. Consult the MLA style guide for clarification.