Wade, W., & Hughes, C. (1994). Inspirations for environmental education. Scholastic.
Lua i Stíl Chicago (17ú heag.)Wade, Winnie, agus Colin Hughes. Inspirations for Environmental Education. Warwickshire: Scholastic, 1994.
Lua MLA (9ú heag.)Wade, Winnie, agus Colin Hughes. Inspirations for Environmental Education. Scholastic, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.