Welton, D. A. (1988). Children and their world: Strategies for teaching (3rd.ed.). Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Welton, David A. Children and Their World: Strategies for Teaching. 3rd.ed. Dallas: Houghton Mifflin, 1988.
Lua MLA (9ú heag.)Welton, David A. Children and Their World: Strategies for Teaching. 3rd.ed. Houghton Mifflin, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.