Ford, D. H., & Lerner, R. M. (1992). Developmental systems theory: An integrative approach. Sage.
Lua i Stíl Chicago (17ú heag.)Ford, Donald H., agus Richard M. Lerner. Developmental Systems Theory: An Integrative Approach. London: Sage, 1992.
Lua MLA (9ú heag.)Ford, Donald H., agus Richard M. Lerner. Developmental Systems Theory: An Integrative Approach. Sage, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.