Παραπομπή APA

Nachtigall, W. (1974). Biological mechanisms of attachment. Springer Verlag.

Παραπομπή Chicago Style

Nachtigall, W. Biological Mechanisms of Attachment. New York: Springer Verlag, 1974.

Παραπομπή MLA

Nachtigall, W. Biological Mechanisms of Attachment. Springer Verlag, 1974.