Keisatsu kenkyū shiryō.
警察硏究資料
APA Citation
Japan. Naimushō. Keihokyoku., Japan. 內務省. 警保局. (141925). Keisatsu kenkyū shiryō. [Tokyo]: Naimushō Keihokyoku.
MLA Citation
Japan. Naimushō. Keihokyoku, and Japan. 內務省. 警保局. Keisatsu Kenkyū Shiryō. [Tokyo]: Naimushō Keihokyoku, 141925.
Warning: These citations may not always be complete (especially for serials).