8Liz O'Brlen (09),Learning outdoors: the Forest School approach[J], Education 3-13, 37: 1, 45 -60.
9Liz O'Brien, and Richard Murray (2007), A marvelous opportunity for children to learn [EB/OL]. http://www, forestry, gov. uk/ pdf/fr0112forestsehoolsreport, pdf/$file/ fr0112forestschoolsreport, pdf.