Foster John & Edited by Foster , J. (1997). Valuing nature?: Ethics, economics and the environment. Routledge.
Cita Chicago (17th ed.)Foster John i John Edited by Foster. Valuing Nature?: Ethics, Economics and the Environment. London: Routledge, 1997.
Cita MLA (9th ed.)Foster John i John Edited by Foster. Valuing Nature?: Ethics, Economics and the Environment. Routledge, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.