Grit : the power of passion and perserverance, 2016: ECIP title page (Angela Duckworth)

Angela Duckworth's personal website, viewed April 28, 2020 (Angela Duckworth; founder and CEO of Character Lab, a nonprofit whose mission is to advance scientific insights that help children thrive; she is Christopher H. Browne Distinguished Professor of Psychology at the University of Pennsylvania and co-director of the Penn-Wharton Behavior Change for Good Initiative; she obtained her Ph. D. in psychology from the University of Pennsylvania; joined the faculty at University of Pennsylvania in 2006; author of Grit) https://angeladuckworth.com/about-angela/

University of Pennsylvania, Psychology website, viewed April 28, 2020: link to People page (Angela Duckworth, Christopher H. Browne Distinguished Professor of Psychology) https://psychology.sas.upenn.edu/people/angela-duckworth