Cita APA (7th ed.)

ebrary, Inc, & Parkin, J. (2012). Cycling and sustainability. Emerald.

Cita Chicago (17th ed.)

ebrary, Inc, i John Parkin. Cycling and Sustainability. Bingley, U.K.: Emerald, 2012.

Cita MLA (9th ed.)

ebrary, Inc, i John Parkin. Cycling and Sustainability. Emerald, 2012.