Rugh, R. (1951). The Frog: Its reproduction and development. McGraw-Hill Book Co., Inc.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRugh, Roberts. The Frog: Its Reproduction and Development. New Delhi: McGraw-Hill Book Co., Inc, 1951.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRugh, Roberts. The Frog: Its Reproduction and Development. McGraw-Hill Book Co., Inc, 1951.
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