1. Bowlby J, ed. Attachment and loss: Vol. 1. attachment. 2nd ed. New York, NY: Basic Books; 1982.
2. Bowlby J. Forty-four juvenile thieves: their characters and home lives. Int J Psycho-Anal. 1944;XXV:19–2.
3. Coates SW, Bowlby J, Margaret SM. Their lives and theories. J Am Psychoanal Assoc. 2004;52:571–1. Accessed May 10, 2016.
4. Shilkret R, Shilkret CJ. Attachment theory. In: Berzoff J, Flanagan LM, Hertz P, editors. Inside out and outside in. 4th ed. Lanham, MD: Rowman & Littlefield; 2016. p. 196–19.
5. Bretherton I. The origins of attachment theory: John Bowlby and Mary Ainsworth. Dev Psychol. 1992;28(5):759–75. Accessed 5/10/2016.