Irvine, R., & Tuthill, M. (2023). Overcoming impossible: Learn to lead, build a team, and catapult your business to success. HarperCollins Leadership, an imprint of HarperCollins Focus LLC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Irvine, Robert, و Matt Tuthill. Overcoming Impossible: Learn to Lead, Build a Team, and Catapult Your Business to Success. New York: HarperCollins Leadership, an imprint of HarperCollins Focus LLC, 2023.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Irvine, Robert, و Matt Tuthill. Overcoming Impossible: Learn to Lead, Build a Team, and Catapult Your Business to Success. HarperCollins Leadership, an imprint of HarperCollins Focus LLC, 2023.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.