Ball, M. J., Crystal, D., & Fletcher, P. (2012). Assessing grammar: The languages of LARSP. Multilingual Matters.
Lua i Stíl Chicago (17ú heag.)Ball, Martin J., David Crystal, agus Paul Fletcher. Assessing Grammar: The Languages of LARSP. Bristol ; Buffalo: Multilingual Matters, 2012.
Lua MLA (8ú heag.)Ball, Martin J., et al. Assessing Grammar: The Languages of LARSP. Multilingual Matters, 2012.
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