Szpilman, Christopher W.A. (1998). "Conservatism and ITS Enemies in Prewar Japan: The Case of Hiranuma Kiichirô and the Kokuhonsha". Hitotsubashi Journal of Social Studies. 30 (2). Hitotsubashi University: 120. ISSN0073-280X. JSTOR43294432.
Szpilman, Christopher W.A. (1998). "Conservatism and ITS Enemies in Prewar Japan: The Case of Hiranuma Kiichirô and the Kokuhonsha". Hitotsubashi Journal of Social Studies. 30 (2). Hitotsubashi University: 120. ISSN0073-280X. JSTOR43294432.