周国强 & 张青. (2010). 环境保护与可持续发展概论: Introduction to the environmental protection and sustainable development. 中国环境科学出版社.
Chicago (17e ed.) Bronvermelding周国强 en 张青. 环境保护与可持续发展概论: Introduction to the Environmental Protection and Sustainable Development. 中国环境科学出版社, 2010.
MLA (8e ed.) Bronvermelding周国强 en 张青. 环境保护与可持续发展概论: Introduction to the Environmental Protection and Sustainable Development. 中国环境科学出版社, 2010.
Let op: Deze citaties zijn niet altijd 100% accuraat.