Gaya APA

Christopher, M. et al (2015). Using a transport portfolio framework to reduce carbon footprint (Vol. 26 Issue: 2, pp.296-312). United Kingdom: Emerald Insight.

Gaya MLA

Christopher, Martin. et al. "Using a transport portfolio framework to reduce carbon footprint". Vol. 26 Issue: 2, pp.296-312 United Kingdom: Emerald Insight, 2015. Article.