Gaya APA

Hassan, R. et al (2005). Ecosystems And Human Well-Being: current state and trends; findings of the condition and trends working group Volume 1 (V.1). London: Island Press.

Gaya MLA

Hassan, Rashid. et al. "Ecosystems And Human Well-Being: current state and trends; findings of the condition and trends working group Volume 1". V.1 London: Island Press, 2005. Text.