Cite

"The Troubleshooter' - unpublished autobiography by Harry Caldwell (234 pp)

MLA

MacInnis, Donald E. "The Troubleshooter' - Unpublished Autobiography by Harry Caldwell (234 Pp). 1958. https://collections.library.yale.edu/catalog/33248337.

APA, 6th edition

MacInnis, D. E. (1958). "The Troubleshooter' - unpublished autobiography by Harry Caldwell (234 pp). https://collections.library.yale.edu/catalog/33248337.