Estolas, J. V. 1. (1974). Child psychology: A modern approach. National Book Store.
Lua i Stíl Chicago (17ú heag.)Estolas, Josefina Villanueva 1928. Child Psychology: A Modern Approach. [Manila]: National Book Store, 1974.
Lua MLA (9ú heag.)Estolas, Josefina Villanueva 1928. Child Psychology: A Modern Approach. National Book Store, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.