Lua APA (7ú heag.)
Heard, D., & Lake, B. (2009). The challenge of attachment for caregiving. Karnac.
Lua i Stíl Chicago (17ú heag.)
Heard, Dorothy, agus Brian Lake. The Challenge of Attachment for Caregiving. London: Karnac, 2009.
Lua MLA (9ú heag.)
Heard, Dorothy, agus Brian Lake. The Challenge of Attachment for Caregiving. Karnac, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.