McCool, S. F., & Roggenbuck, J. W. (1974). Off -road vehicles and public lands: A problem analysis. Department of Forestry and Outdoor Recreation & Tourism.
Cita Chicago (17th ed.)McCool, Stephen F., i Joseph W. Roggenbuck. Off -road Vehicles and Public Lands: A Problem Analysis. Logan, Utah: Department of Forestry and Outdoor Recreation & Tourism, 1974.
Cita MLA (9th ed.)McCool, Stephen F., i Joseph W. Roggenbuck. Off -road Vehicles and Public Lands: A Problem Analysis. Department of Forestry and Outdoor Recreation & Tourism, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.