Hurlock, E. B. (1978). Child development (6th ed.). National Book Store.
Lua i Stíl Chicago (17ú heag.)Hurlock, Elizabeth Bergner. Child Development. 6th ed. Manila: National Book Store, 1978.
Lua MLA (9ú heag.)Hurlock, Elizabeth Bergner. Child Development. 6th ed. National Book Store, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.