APA (7 वां संस्करण) प्रशस्ति पत्र

Piedragoza, M. V. L. (2013). Teachers' English speaking accuracy: Effects on pupils' critical thinking skills and science achievement. College of Education, University of the Philippines Diliman.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Piedragoza, Ma. Veronica Livelo. Teachers' English Speaking Accuracy: Effects on Pupils' Critical Thinking Skills and Science Achievement. Quezon City: College of Education, University of the Philippines Diliman, 2013.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Piedragoza, Ma. Veronica Livelo. Teachers' English Speaking Accuracy: Effects on Pupils' Critical Thinking Skills and Science Achievement. College of Education, University of the Philippines Diliman, 2013.

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