Anders, L. (2020). Once upon a unicorn (First edition.). Crown Books for Young Readers, an imprint of Random House Children's Books, a division of Penguin Random House LLC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Anders, Lou. Once upon a Unicorn. First edition. New York: Crown Books for Young Readers, an imprint of Random House Children's Books, a division of Penguin Random House LLC, 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Anders, Lou. Once upon a Unicorn. First edition. Crown Books for Young Readers, an imprint of Random House Children's Books, a division of Penguin Random House LLC, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.