Bowlby, J. Loss sadness and depression: Attachment and loss (reimpáginas.).
Lua i Stíl Chicago (17ú heag.)Bowlby, John. Loss Sadness and Depression: Attachment and Loss. reimpáginas.
Lua MLA (8ú heag.)Bowlby, John. Loss Sadness and Depression: Attachment and Loss. reimpáginas.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.