Citazione Stile APA (7a Edizione)

Smil, V. (1993). Global ecology: Environmental change and social flexibility. Routledge.

Citazione stile Chigago Style (17a edizione)

Smil, Vaclav. Global Ecology: Environmental Change and Social Flexibility. London: Routledge, 1993.

Citatione MLA (9a ed.)

Smil, Vaclav. Global Ecology: Environmental Change and Social Flexibility. Routledge, 1993.