Barnes, R. D. (1992). Successful Study For Degrees/rob Barnes. Routledge.
Lua i Stíl Chicago (17ú heag.)Barnes, Robert D. Successful Study For Degrees/rob Barnes. Routledge, 1992.
Lua MLA (8ú heag.)Barnes, Robert D. Successful Study For Degrees/rob Barnes. Routledge, 1992.
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