Wales, J., & Clarke, P. (2005). Learning citizenship: Practical teaching strategies for secondary schools. RoutledgeFalmer.
Lua i Stíl Chicago (17ú heag.)Wales, Jenny, agus Paul Clarke. Learning Citizenship: Practical Teaching Strategies for Secondary Schools. London: RoutledgeFalmer, 2005.
Lua MLA (9ú heag.)Wales, Jenny, agus Paul Clarke. Learning Citizenship: Practical Teaching Strategies for Secondary Schools. RoutledgeFalmer, 2005.
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