Simpson, M. S. (1995). Environmental Awareness Activities for Librarians and Teachers: 20 Interdisciplinary Units for Use in Grades 2-8.
Chicago-Zitierstil (17. Ausg.)Simpson, Martha Seif. Environmental Awareness Activities for Librarians and Teachers: 20 Interdisciplinary Units for Use in Grades 2-8. 1995.
MLA-Zitierstil (9. Ausg.)Simpson, Martha Seif. Environmental Awareness Activities for Librarians and Teachers: 20 Interdisciplinary Units for Use in Grades 2-8. 1995.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.