Tolong jelaskan mengenai PDF dari Risshō Kōsei Kai

Stone, Jaquelin (2003). "Nichiren's Activist Heirs: Soka Gakkai, Rissho Koseikai, Nipponzan Myohoji", in Christopher Queen et al., "Action Dharma, New Studies in Engaged Buddhism", RoutledgeCurzon, pp. 63–94

Watanabe, Eimi (1968). Risshō Kōsei-Kai: A Sociological Observation of Its Members, Their Conversion and Their Activities. Contemporary Religions in Japan 9 (1/2), 75-151