APA
Cummings R., Schulze W. D. & Brookshire D. S. (1986). Valuing Environmental Goods: An Assesment Of The contigent v. Maryland: Rowmann And Littelfield Publishers Inc.
Chicago
Cummings RG, Schulze WIlliam D and Brookshire David S. 1986. Valuing Environmental Goods: An Assesment Of The contigent v. Maryland: Rowmann And Littelfield Publishers Inc.
Harvard
Cummings R., Schulze W. D. and Brookshire D. S. (1986). Valuing Environmental Goods: An Assesment Of The contigent v. Maryland: Rowmann And Littelfield Publishers Inc.
MLA
Cummings RG, Schulze WIlliam D and Brookshire David S. Valuing Environmental Goods: An Assesment Of The contigent v. Maryland: Rowmann And Littelfield Publishers Inc. 1986.