Vilbar, A. P. (2011). Effects of ESL courseware for sustainable development on grammar proficiency and reading skills of various learners. Philippine Journal for Language Teaching.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVilbar, Aurelio P. "Effects of ESL Courseware for Sustainable Development on Grammar Proficiency and Reading Skills of Various Learners." Philippine Journal for Language Teaching 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVilbar, Aurelio P. "Effects of ESL Courseware for Sustainable Development on Grammar Proficiency and Reading Skills of Various Learners." Philippine Journal for Language Teaching, 2011.
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