APA
Wals Harry,, . (1982). Town farm : New approaches in the use of active educational methods in the environment field. Strasbourg: Council of Europe.
Chicago
Wals Harry,, . 1982. Town farm : New approaches in the use of active educational methods in the environment field. Strasbourg: Council of Europe.
Harvard
Wals Harry,, . (1982). Town farm : New approaches in the use of active educational methods in the environment field. Strasbourg: Council of Europe.
MLA
Wals Harry,, . Town farm : New approaches in the use of active educational methods in the environment field. Strasbourg: Council of Europe. 1982.