APA-viite

Berck, P., & Helfand, G. (2011). Economics of the environment: Peter Berck and Gloria Helfand. Addison - Wesley.

Chicago-tyylinen lähdeviittaus

Berck, Peter, ja Gloria Helfand. Economics of the Environment: Peter Berck and Gloria Helfand. Boston: Addison - Wesley, 2011.

MLA-viite

Berck, Peter, ja Gloria Helfand. Economics of the Environment: Peter Berck and Gloria Helfand. Addison - Wesley, 2011.