APA (7 वां संस्करण) प्रशस्ति पत्र

Urbiztondo, L. G. (1979). Class vs. field activities as supplement to the lecture-discussion method: Effects on achievement in high school biology.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Urbiztondo, Lorna Galvan. Class Vs. Field Activities as Supplement to the Lecture-discussion Method: Effects on Achievement in High School Biology. 1979.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Urbiztondo, Lorna Galvan. Class Vs. Field Activities as Supplement to the Lecture-discussion Method: Effects on Achievement in High School Biology. 1979.

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