Lobel, A. Frog And Toad Are Friends (Library). Harpercollins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLobel, Arnold. Frog And Toad Are Friends (Library). Harpercollins.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLobel, Arnold. Frog And Toad Are Friends (Library). Harpercollins.
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