APA aipamena

Hartley-Ballestero, R. (2009). Eco-efficiency: Environmental Business Management.

Chicago Style aipamena

Hartley-Ballestero, Rocío. Eco-efficiency: Environmental Business Management. 2009.

MLA aipamena

Hartley-Ballestero, Rocío. Eco-efficiency: Environmental Business Management. 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.