Rolfe, C., Michaelowa, A., & Dutschke, M. (1999). Closing the Gap: A Comparison of Approaches to Encourage Early Greenhouse Gas Emission Reductions.
Chicago-referens (17:e uppl.)Rolfe, Chris, Axel Michaelowa, och Michael Dutschke. Closing the Gap: A Comparison of Approaches to Encourage Early Greenhouse Gas Emission Reductions. Hamburg, 1999.
MLA-referens (8:e uppl.)Rolfe, Chris, et al. Closing the Gap: A Comparison of Approaches to Encourage Early Greenhouse Gas Emission Reductions. 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.