Ham, S. H. (1992). Environmental interpretation: A practical guide for people with big ideas and small budgets. North American Press.
Chicago-Zitierstil (17. Ausg.)Ham, Sam H. Environmental Interpretation: A Practical Guide for People with Big Ideas and Small Budgets. Golden, Colo: North American Press, 1992.
MLA-Zitierstil (9. Ausg.)Ham, Sam H. Environmental Interpretation: A Practical Guide for People with Big Ideas and Small Budgets. North American Press, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.