Montgomery, S. (2010). Birdology: Adventures with a pack of hens, a peck of pigeons, cantankerous crows, fierce falcons, hip hop parrots, baby hummingbirds, and one murderously big living dinosaur (1st Free Press hardcover ed.). Free Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Montgomery, Sy. Birdology: Adventures with a Pack of Hens, a Peck of Pigeons, Cantankerous Crows, Fierce Falcons, Hip Hop Parrots, Baby Hummingbirds, and One Murderously Big Living Dinosaur. 1st Free Press hardcover ed. New York: Free Press, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Montgomery, Sy. Birdology: Adventures with a Pack of Hens, a Peck of Pigeons, Cantankerous Crows, Fierce Falcons, Hip Hop Parrots, Baby Hummingbirds, and One Murderously Big Living Dinosaur. 1st Free Press hardcover ed. Free Press, 2010.