Perhaps the most famous and successful therapy self-report instrument ever. Started with the paper Beck, A. T., Ward, C. H., Mendelson, M., Mock, J., & Erbaugh, J. (1961). An inventory for measuring depression. Archives of General Psychiatry, 4, 561–571. https://doi.org/10.1001/archpsyc.1961.01710120031004 about the first 21 item version of the measure. Relatively unusually for a much used measure, the BDI has had two versions historically and the BDI-I has been superseded by the BDI-II, still a 21 item measure. See Beck, A. T., Steer, R. A., Ball, R., & Ranieri, W. F. (1996). Comparison of Beck Depression Inventories-IA and-II in Psychiatric Outpatients. Journal of Personality Assessment, 67(3), 588–597. https://doi.org/10.1207/s15327752jpa6703_13. Like its sibling measure, the BAI, the BDI is a commercial measure owned by Pearson, see here.
Chapters 3, 4 and 5.