Gates, B., & Rogak, L. (2012). Impatient optimist: Bill gates in his own words. Collins Business.
استشهاد بنمط شيكاغوGates, Bill, و Lisa Rogak. Impatient Optimist: Bill Gates in His Own Words. Utterpradesh: Collins Business, 2012.
MLA استشهادGates, Bill, و Lisa Rogak. Impatient Optimist: Bill Gates in His Own Words. Collins Business, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.