APA (7th ed.) Zitazioa

Speth, J. G. (2008). Global Environmental Challenges: Transitions to a Sustainable World. Orient BlackSwan.

Chicago Style (17th ed.) Zitazioa

Speth, James Gustave. Global Environmental Challenges: Transitions to a Sustainable World. New Delhi: Orient BlackSwan, 2008.

MLA (9th ed.) Zitazioa

Speth, James Gustave. Global Environmental Challenges: Transitions to a Sustainable World. Orient BlackSwan, 2008.

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