Garcia, H. F. (2012). The power of communication: Skills to build trust, inspire loyalty, and lead effectively. Pearson Education, Inc.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Garcia, Helio Fred. The Power of Communication: Skills to Build Trust, Inspire Loyalty, and Lead Effectively. Upper Saddle River, New Jersey: Pearson Education, Inc, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Garcia, Helio Fred. The Power of Communication: Skills to Build Trust, Inspire Loyalty, and Lead Effectively. Pearson Education, Inc, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.