The basics of a reference list entry for an archival document:
Black, A. J. (1953, May). Deaths of the Barker Gang. [Letter to Jane Jones]. Black Family Papers (CA 9724, Box 5, File 3A. DeVry University Archives, Portland, OR.
As Frank (1935) says ...
Frank, L. K. (1935, February 4). [Letter to Robert M. Ogden]. Rockefeller Archive Centre (GEB series 1.3, Box 371, Folder 3877), Tarrytown, NY, United States.
Zacharius, G. P. (1953, August 15). [Letter to William Rickel (W. Rickel, Trans.)]. Copy in possession of Hendrika Vande Kemp.
(Allport, G. W., 1930-1967, Allport to E. G. Wilstein, March 20, 1939)
(Allport, G. W., 1930-1967, E. G. Wilstein to Allport, December 26, 1937)
Allport, G. W. (1930-1967). Correspondence. Gordon W. Allport Papers (HUG 4118.10). Harvard University Archives, Cambridge, MA, United States.
(Berliner, 1959) ...
As discussed in Berliner (1959) ...
Berliner, A. (1959). Notes for a lecture on reminiscences of Wundt and Leipzig. Anna Berliner Memoirs (Box M50). Archives of the History of American Psychology, University of Akron, Akron, OH, United States.
[Allport, A.?]. [ca. 1937]. Marion Taylor today - by the biographer. Unpublished manuscript, Marion Taylor Papers. Schlesinger Library, Radcliffe College, Cambridge, MA, United States.
(Subcommittee on Mental Hygiene Personnel in School Programs, 1949)
Subcommittee on Mental Hygiene Personnel in School Programs. (1949, November 5-6). Meeting of Subcommittee on Mental Hygiene Personnel in School Programs. David Shakow Papers (M1360). Archives of the History of American Psychology, University of Akron, Akron, OH, United States.
Smith, M. B. (1989, August 12). Interview by C. A. Kiesler [Tape recording]. President's Oral History Project, American Psychological Association. APA Archives, Washington, DC, United States.
Sparkman, C. F. (1973). An oral history with Dr. Colley F. Sparkman/Interviewer: Orley B. Caudill. Mississippi Oral History Program (Vol. 289), University of Southern Mississippi, Hattiesburg, United States.
("Psychoanalysis institute," 1948)
Psychoanalysis institute to open in the new year. (1948, September 18). [Clipping from an unidentified Dayton, OH newspaper]. Copy in possession of the author.
(Sci-Art Publishers, 1935)
Sci-Art Publishers. (1935). Sci-Art Publications [Brochure]. Cambridge, MA: Author. C. J. Roback Papers (HUGFP 104.50, Box 2, Folder "Miscellaneous Psychology Materials"). Harvard University Archives, Cambridge, MA, United States.
([Photographs of Robert M. Yerkes], ca. 1917–1954)
[Photographs of Robert M. Yerkes]. (ca. 1917–1954). Robert Mearns Yerkes Papers (Box 137, Folder 2292), Manuscripts and Archives, Yale University Library, New Haven, CT, United States.