1. Beijing Normal University History Library (1984a) Wusi yundong yu beijing gaoshi=May Fourth Movement and Beijing Higher Normal School [五四运动与北京高师]. Beijing Normal University Press, Beijing
2. Beijing Normal University History Library (1984b) Wusi yundong yu beijing gaoshi=May Fourth Movement and Beijing Higher Normal School[五四运动与北京高师]. Beijing Normal University Press, Beijing
3. Chen LJ (1948) Introduction to the theoretical foundations of social education. J Educ No. 11:19
4. Chinese Vocational Education Society (1983) Sheshi ziliao xuanji=Selected Collections of History of the Association [社史资料选辑]. Literature and History Press, Beijing
5. Daniel S, Michael S (2013) Social pedagogy: Historical traditions and transnational connections. Educ Policy Anal Arch 21(35):1–16. https://www.redalyc.org/pdf/2750/275029728035.pdf