1. Ader, H. J., Van Marwik, H. W., Deltaan, M., & Beekman, A. (2008). Advising on Research Methods: A consultant's comparison. Huizen, the Netherlands: Johannes Van Kessel Publishing.
2. Ahmad, A. (2013). Role of social studies education in national development in Nigeria. Academic Journal of Interdisciplinary Studies, 2 (6), 23-25.
3. Aitken, C.; Sinnema, G. (2008). Effective pedagogy in social sciences/Tikanga â iwi: Best evidence synthesis iteration. Wellington: Ministry of Education. [www.education counts. govt.nz/goto/BES]
4. Akumanyi, R. S. (2007). Citizenship education: a prerequisite for national integration in Nigeria. Akamkpa Journal of Education, 2(2), 56-98
5. Borg & Gall, (2007). This research on the Relevance of integrating play activities in ECDE Curriculum. Sage Publishers.