edited by Thaddeus C. Trzyna
International Center for the Environment and Public Policy, 1995
Buku Teks
Business Innovations Center (BIC), 2016
Buku Teks
The World Bank; Dono Sumardi, translator
Salemba Empat, 2006
Buku Teks
Oxford University Press , 1982
Buku Teks
Pierre Jacquet; Pierre Jacquet, editor
Presses de Sciences, 2009
Buku Teks