Παραπομπή σε μορφή APA (7η εκδ.)

De Tray, D. N. (1972). The interaction between parent investment in children and family size: An economic analysis. Rand Corporation.

Παραπομπή σε μορφή Chicago (17η εκδ.)

De Tray, Dennis N. The Interaction Between Parent Investment in Children and Family Size: An Economic Analysis. Santa Monica, Calif: Rand Corporation, 1972.

Παραπομπή σε μορφή MLA (9th εκδ.)

De Tray, Dennis N. The Interaction Between Parent Investment in Children and Family Size: An Economic Analysis. Rand Corporation, 1972.