Gregg, J. (2022). If Nietzsche were a narwhal: What animal intelligence reveals about human stupidity (First edition.). Little Brown & Company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gregg, Justin. If Nietzsche Were a Narwhal: What Animal Intelligence Reveals About Human Stupidity. First edition. New York: Little Brown & Company, 2022.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Gregg, Justin. If Nietzsche Were a Narwhal: What Animal Intelligence Reveals About Human Stupidity. First edition. Little Brown & Company, 2022.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.