Cita APA (7a ed.)

Barker, T., & Köhler, J. (1998). International competitiveness and environmental policies. Edward Elgar.

Cita Chicago Style (17a ed.)

Barker, Terry, y Jonathan Köhler. International Competitiveness and Environmental Policies. Cheltenham [etc.]: Edward Elgar, 1998.

Cita MLA (9a ed.)

Barker, Terry, y Jonathan Köhler. International Competitiveness and Environmental Policies. Edward Elgar, 1998.