NORTH KLAUS. (1992). ENVIRONMENTAL BUSINESS MANAGEMENT. INTERNATIONAL LABOUR ORGANIZATION.
Citazione stile Chigago Style (17a edizione)NORTH KLAUS. ENVIRONMENTAL BUSINESS MANAGEMENT. GENEVA: INTERNATIONAL LABOUR ORGANIZATION, 1992.
Citatione MLA (9a ed.)NORTH KLAUS. ENVIRONMENTAL BUSINESS MANAGEMENT. INTERNATIONAL LABOUR ORGANIZATION, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.