Dickow, Alexander. "Jacob, Max (1876–1944)." The Routledge Encyclopedia of Modernism. : Taylor and Francis, 2016. Date Accessed 20 Mar. 2023 https://www.rem.routledge.com/articles/jacob-max-1876-1944. doi:10.4324/9781135000356-REM1122-1
Dickow, A.(2016). Jacob, Max (1876–1944). In The Routledge Encyclopedia of Modernism. : Taylor and Francis. Retrieved 20 Mar. 2023, from https://www.rem.routledge.com/articles/jacob-max-1876-1944. doi:10.4324/9781135000356-REM1122-1
Dickow, A. 2016, 'Jacob, Max (1876–1944)' in Routledge Encyclopedia of Modernism, Taylor and Francis, viewed 20 March 2023, <https://www.rem.routledge.com/articles/jacob-max-1876-1944>. doi:10.4324/9781135000356-REM1122-1