"IPSR Directory: Faculty". ipsr.berkeley.edu. Institute of Personality and Social Research. Archived from the original on 2010-06-14. Retrieved 2015-03-30.
"Born Rebels". PaulaGordon.com. The Paula Gordon Show. Retrieved 2015-03-30.
sulloway.org
Sulloway, F.J. (2001). Birth Order, Sibling Competition, and Human Behavior. In Paul S. Davies and Harmon R. Holcomb, (Eds.), Conceptual Challenges in Evolutionary Psychology: Innovative Research Strategies. Dordrecht and Boston: Kluwer Academic Publishers. pages 39–83. "Full text"(PDF). (325 KB)
web.archive.org
"IPSR Directory: Faculty". ipsr.berkeley.edu. Institute of Personality and Social Research. Archived from the original on 2010-06-14. Retrieved 2015-03-30.