Cita APA

Simpson, R. D. 1. (1999). Productivity in natural resource industries: Improvement through innovation. Washington, D.C.: Resources for the Future.

Citación estilo Chicago

Simpson, Ralph David 1957-. Productivity in Natural Resource Industries: Improvement Through Innovation. Washington, D.C.: Resources for the Future, 1999.

Cita MLA

Simpson, Ralph David 1957-. Productivity in Natural Resource Industries: Improvement Through Innovation. Washington, D.C.: Resources for the Future, 1999.