O'Neill, R. (1973). Kernel Lessons Plus: A post-intermediate course : Students' Book. London: Longman.
Chicago Stili AlıntıO'Neill, Robert. Kernel Lessons Plus: A Post-intermediate Course : Students' Book. London: Longman, 1973.
MLA AlıntıO'Neill, Robert. Kernel Lessons Plus: A Post-intermediate Course : Students' Book. London: Longman, 1973.
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