1. S. Franch, “Global citizenship education between qualification, socialization, and subjectification,” in The Plagrave Handbook of Citizenship and Education, (Palgrave Macmillan: London, 2019), pp 1-15.
2. J. J. Cogan and R. Derricott R, Citizenship education for the 21st century, (Routledge: London, 1998).
3. C. Titus, “Pendidikan kewarganegaraan untuk pemahaman global,” in Belajar Civic Education from Amerika (LKIS: Yogyakarta, 1999).
4. S. Karsten, P. Kubow and Z. Matrai, “Challenge facing the 21st century citizen: Views of policy makers,” in: Cogan Citizenship Education for the 21st Century, (Routledge: London, 1998).
5. J. A. Bank, Educational Researcher, 37,129-39, (2008).