Hagan, A. (1992). Environmental Management in the Former Soviet Union.
Citazione stile Chigago Style (17a edizione)Hagan, Andrea. Environmental Management in the Former Soviet Union. 1992.
Citatione MLA (9a ed.)Hagan, Andrea. Environmental Management in the Former Soviet Union. 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.