APA-referens (7:e uppl.)

Curtis, C., & Low, N. (2012). Institutional barriers to sustainable transport. Ashgate.

Chicago-referens (17:e uppl.)

Curtis, Carey, och Nicholas Low. Institutional Barriers to Sustainable Transport. Burlington, Vt.: Ashgate, 2012.

MLA-referens (9:e uppl.)

Curtis, Carey, och Nicholas Low. Institutional Barriers to Sustainable Transport. Ashgate, 2012.