APA-viite

Callan, S. J., & Scott J. Callan; Janet M. Thomas. Environmental economics and management: Theory, policy and applications. United States: South-Western,Thomson Learning.

Chicago-tyylinen lähdeviittaus

Callan, Scott J., ja Scott J. Callan; Janet M. Thomas. Environmental Economics and Management: Theory, Policy and Applications. United States: South-Western,Thomson Learning.

MLA-viite

Callan, Scott J., ja Scott J. Callan; Janet M. Thomas. Environmental Economics and Management: Theory, Policy and Applications. United States: South-Western,Thomson Learning.

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