APA (7th ed.) Zitazioa
ebrary, Inc, & Parkin, J. (2012). Cycling and sustainability. Emerald.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, eta John Parkin. Cycling and Sustainability. Bingley, U.K.: Emerald, 2012.
MLA (9th ed.) Zitazioa
ebrary, Inc, eta John Parkin. Cycling and Sustainability. Emerald, 2012.
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