Howard Schultz and Dori Jones Yang, Pour Your Heart into It: How Starbucks Built a Company One Cup at a Time (New York: Hachette, 1999).

Howard Schultz and Dori Jones Yang, Pour Your Heart into It: How Starbucks Built a Company One Cup at a Time (New York: Hachette, 1999), 4.

Howard Schultz and Dori Jones Yang, Pour Your Heart into It: How Starbucks Built a Company One Cup at a Time (New York: Hachette, 1999), 7.

Alice H. Eagly, «The His and Hers of Prosocial Behavior: An Examination of the Social Psychology of Gender», American Psychologist 64, no. 8 (2009): 644–658; Zeno E. Franco, Kathy Blau, and Philip G. Zimbardo, «Heroism: A Conceptual Analysis and Differentiation Between Heroic Action and Altruism», Review of General Psychology 15, no. 2 (2011): 99–113; Sara Staats et al., «The Hero Concept: Self, Family, and Friends Who Are Brave, Honest, and Hopeful», Psychological Reports 104, no. 3 (2009): 820–832.