Simon, S., & Warnick, E. (1998). They swim the seas: The mystery of animal migration. Browndeer Press/Harcourt Brace.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSimon, Seymour, और Elsa Warnick. They Swim the Seas: The Mystery of Animal Migration. San Diego, Calif.: Browndeer Press/Harcourt Brace, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSimon, Seymour, और Elsa Warnick. They Swim the Seas: The Mystery of Animal Migration. Browndeer Press/Harcourt Brace, 1998.
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