9Michael L. Cook,Fabio R. Chaddad,Constantine Iliopoulos, 2004, “Advances in Cooperative Theory since 1990: A Review of Agricultural Economics Literature”, Edited by Restructing Agriculturcd Cooperatives, George W. J. Hendrikse, Erasmus University Rotterdam.
10R. E. Torgerson, 2004, "Producer Marketing Through Cooperatives", Edited by Christopher D.Merrett, Norman Walzer, M.E.Sharpe, Inc.