Outliers draws on dozens of biographies, scientific studies, interviews, reports and other sources, listed at the end of the book. Here are just a few. Search for others via OneSearch.
The Power of Clan: The Influence of Human Relationships on Heart Disease by John G. Bruhn and Stewart Wolf, 1993.
"Unequal Competition as an Impediment to Personal Development: A Review of the Relative Age Effect in Sport" by Jochen Musch and Simon Grondin in Developmental Review, 2001.
"The Role of Deliberate Practice in the Acquisition of Expert Performance" by K. Anders Ericsson, et al in Psychological Review, 1993.
Successful Intelligence: How Practical and Creative Intelligence Determine Success in Life by Robert J. Sternberg, 1997.
Unequal Childhoods: Class, Race, and Family Life by Annette Lareau, 2011.
Birth and Fortune: The Impact of Numbers on Personal Welfare by Richard A. Easterlin, 1987.
Culture of Honor: The Psychology of Violence in the Southby Richard E. Nisbett and Dov Cohen, 1996.
"Cultural Diversity and Crew Communication" by Ute Fischer and Judith Orasanu, 1999. (conference paper)
"If Man Works Hard the Land Will Not Be Lazy - Entrepreneurial Values in North Chinese Peasant Proverbs" by R. David Arkush in Modern China, 1984.
School's In: The History of Summer Education in American Public Schools by Kenneth M. Gold, 2002.
Brown Face, Big Master by Joyce Gladwell, 2003.