“Boeck, P.D., Gore, L. R., Gonzalez, T., & Martin, E. S. (2019). “An Alternative View on the Measurement of Intelligence and its History”. The Cambridge Handbook of Intelligence, 47-74. https://doi.org/10.1017/9781108770422.005
Jonathan Baron (2006). "History: Cattell at Penn". Retrieved 2014-09-24. Baron cites C. S. Gruber (1972), "Academic freedom at Columbia University: The case of James McKeen Cattell", AAUP Bulletin, Autumn, pp. 297-305, with respect to Cattell's views on the war and place in the debate on academic freedom.