HERCULES :
a modeling system with knowledge about economics /
by Arne Drud.
APA Citation
Drud, A. (1987). HERCULES: a modeling system with knowledge about economics. [Washington, D.C.]: Development Research Dept., Economics and Research Staff, World Bank.
MLA Citation
Drud, Arne. HERCULES: a Modeling System With Knowledge About Economics. [Washington, D.C.]: Development Research Dept., Economics and Research Staff, World Bank, 1987.
Warning: These citations may not always be complete (especially for serials).