Ham, S. H. (1992). Environmental interpretation: A practical guide for people with big ideas and small budgets. North American Press.
芝加哥风格引文Ham, Sam H. Environmental Interpretation: A Practical Guide for People with Big Ideas and Small Budgets. Golden, Colo: North American Press, 1992.
MLA引文Ham, Sam H. Environmental Interpretation: A Practical Guide for People with Big Ideas and Small Budgets. North American Press, 1992.
警告：这些引文格式不一定是100％准确.