Παραπομπή σε μορφή APA (7η εκδ.)

Foster, W. When you've made enough to make a difference: A strategy for becoming an effective philanthopist. Harvard Business Review.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Foster, William. "When You've Made Enough to Make a Difference: A Strategy for Becoming an Effective Philanthopist." Harvard Business Review .

Παραπομπή σε μορφή MLA (9th εκδ.)

Foster, William. "When You've Made Enough to Make a Difference: A Strategy for Becoming an Effective Philanthopist." Harvard Business Review, .