Roma Gans. (1996). How Do Birds Find Their Way? (Let's-Read-and-Find-Out Science 2). HarperCollins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoma Gans. How Do Birds Find Their Way? (Let's-Read-and-Find-Out Science 2). HarperCollins, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRoma Gans. How Do Birds Find Their Way? (Let's-Read-and-Find-Out Science 2). HarperCollins, 1996.
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