Johnston, B. (1989). practical assessment in science: Physics. heinemann Educational Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnston, Brian. Practical Assessment in Science: Physics. London: heinemann Educational Books, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJohnston, Brian. Practical Assessment in Science: Physics. heinemann Educational Books, 1989.
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