Freeman, R., & Lewis, R. (1998). Planning and implementing assessment. Routledge.
Lua i Stíl Chicago (17ú heag.)Freeman, Richard, agus Roger Lewis. Planning and Implementing Assessment. London: Routledge, 1998.
Lua MLA (8ú heag.)Freeman, Richard, agus Roger Lewis. Planning and Implementing Assessment. Routledge, 1998.
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