Haldar, R., Carpenter, C., & Beddia, M. (2018). P is for pterodactyl: The worst alphabet book ever : all the letters that misbehave and make words nearly impossible to pronounce. Sourcebooks Jabberwocky.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Haldar, Raj, Chris Carpenter, و Maria Beddia. P Is for Pterodactyl: The Worst Alphabet Book Ever : All the Letters That Misbehave and Make Words Nearly Impossible to Pronounce. Naperville, Illinois: Sourcebooks Jabberwocky, 2018.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Haldar, Raj, et al. P Is for Pterodactyl: The Worst Alphabet Book Ever : All the Letters That Misbehave and Make Words Nearly Impossible to Pronounce. Sourcebooks Jabberwocky, 2018.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.