Cita APA (7a ed.)

Smil, V. (1993). Global ecology: Environmental change and social flexibility (5a. ed.). Routledge.

Cita Chicago Style (17a ed.)

Smil, Vaclav. Global Ecology: Environmental Change and Social Flexibility. 5a. ed. New York: Routledge, 1993.

Cita MLA (8a ed.)

Smil, Vaclav. Global Ecology: Environmental Change and Social Flexibility. 5a. ed. Routledge, 1993.