Cita APA (7a ed.)

Ham, S. H. (1992). Environmental interpretation: A practical guide for people with big ideas and small budgets. North American Press.

Cita Chicago Style (17a ed.)

Ham, Sam H. Environmental Interpretation: A Practical Guide for People with Big Ideas and Small Budgets. Golden, Colo: North American Press, 1992.

Cita MLA (9a ed.)

Ham, Sam H. Environmental Interpretation: A Practical Guide for People with Big Ideas and Small Budgets. North American Press, 1992.