White, B. (2011). Betty & friends: My life at the zoo (Doubleday large print home library ed.). G.P. Putnams's Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWhite, Betty. Betty & Friends: My Life at the Zoo. Doubleday large print home library ed. New York: G.P. Putnams's Sons, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWhite, Betty. Betty & Friends: My Life at the Zoo. Doubleday large print home library ed. G.P. Putnams's Sons, 2011.
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