Speth, J. G. (2012). Global environmental challenges: Transitions to a sustainable world. Orient Blackswan.
シカゴスタイル引用形Speth, James Gustave. Global Environmental Challenges: Transitions to a Sustainable World. New Delhi: Orient Blackswan, 2012.
MLA引用形式Speth, James Gustave. Global Environmental Challenges: Transitions to a Sustainable World. Orient Blackswan, 2012.
警告: この引用は必ずしも正確ではありません.