Castillon, D. A. (1996). Conservation of natural resources: A resource management approach (2nd ed.). Brown & Benchmark Publishers.
Cita Chicago (17th ed.)Castillon, David A. Conservation of Natural Resources: A Resource Management Approach. 2nd ed. Madison, Wis: Brown & Benchmark Publishers, 1996.
Cita MLA (9th ed.)Castillon, David A. Conservation of Natural Resources: A Resource Management Approach. 2nd ed. Brown & Benchmark Publishers, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.