CONTENTS
(1) Authoritative online information
(2) Recommended books
(3) For professionals
(1) Authoritative online information
How Your Attachment Style Impacts Your Relationship – Learn how to identify your attachment patterns and how they’re affecting your relationships. (Psychology Today)
Karen, R. (1990). Becoming attached. The Atlantic Monthly, 2, 35-70. [PDF]
Wikipedia - Attachment Theory
A Brief Overview of Adult Attachment Theory and Research (Chris Fraley, PhD)
(2) Recommended books
Attached: The New Science of Adult Attachment and How It Can Help YouFind - and Keep - Love (2012) by Amir Levine and Rachel Heller
Karen R (1998). Becoming Attached: First Relationships and How They Shape Our Capacity to Love. Oxford and New York: Oxford University Press.
(3) For professionals
Chris Fraley, PhD (University of Illinois): Chris Fraley, University of Illinois: http://labs.psychology.illinois.edu/~rcfraley/index.html
Patricia Crittenden, PhD: https://patcrittenden.com
Kim Barthomomew, PhD: Self-Report Attachment Measures
Under review
Insecure in Love: How Anxious Attachment Can Make You Feel Jealous, Needy, and Worried and What You Can Do About It (2014) by Leslie Becker-Phelps, PhD [Amazon]
On-line Attachment Questionnaire (CRQ/ECR-R) (Fraley, Waller, & Brennan, 2000)