Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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