• "The Ultimate Personality Guide" By Jennifer Freed and Debra Birnbaum

Barnes & Noble.com - Ultimate Personality Guide

• "The Birth Order Effect: How to Better Understand Yourself and Others" By Cliff Isaacson and Kris Radish

Barnes & Noble.com - Birth Order Effect: How to Better Understand Yourself and Others

• "The Birth Order Book: Why You Are The Way You Are" By Kevin Leman

Barnes & Noble.com - Birth Order Book: Why You Are the Way You Are

• "Personality Traits Linked to Birth Order"

CBS News | Personality Traits Linked To Birth Order | June 11, 2002 14:20:35

• "Alderian Overview of Birth Order Characteristics"

Adlerian Overview of Birth Order Characteristics - Alfred Adler Institutes of San Francisco and Northwestern Washington

• "Birth Order and Personality"

The Born Identity

• Ancestry.com - The Importance of Birth Order

• Birth Order

• Birth Order - Science or Myth?

• It's My Life . Family . Birth Order | PBS Kids GO!

• Birth Order Plus - The Birth Order Home Page - Clifford Isaacson

• How your birth order shapes your personality