Iga, Mamoru (1978). "Suicide in Japan". Social Science & Medicine. Part A: Medical Psychology & Medical Sociology. 12 (4): 507-16. doi:10.1016/0271-7123(78)90118-9. PMID734468. p. 519. Erişim tarihi: 21 Haziran 2021. (İngilizce)
Iga, Mamoru (1978). "Suicide in Japan". Social Science & Medicine. Part A: Medical Psychology & Medical Sociology. 12 (4): 507-16. doi:10.1016/0271-7123(78)90118-9. PMID734468. p. 519. Erişim tarihi: 21 Haziran 2021. (İngilizce)