Kunkel, A. B., & Escobar, P. (2020). Digging for words: José Alberto Gutiérrez and the library he built. Schwartz & Wade Books, an imprint of Random House Children's Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kunkel, Angela Burke, و Paola Escobar. Digging for Words: José Alberto Gutiérrez and the Library He Built. New York: Schwartz & Wade Books, an imprint of Random House Children's Books, 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Kunkel, Angela Burke, و Paola Escobar. Digging for Words: José Alberto Gutiérrez and the Library He Built. Schwartz & Wade Books, an imprint of Random House Children's Books, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.