Dyfyniad APA

Hickman, R., Banister, D., & Penn, A. (2009). Low carbon transport challenges ahead. University College London.

Dyfyniad Arddull Chicago

Hickman, R., D. Banister, and A. Penn. Low Carbon Transport Challenges Ahead. University College London, 2009.

Dyfyniad MLA

Hickman, R., et al. Low Carbon Transport Challenges Ahead. University College London, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.