Behrens, W., & Hawranek, P. M. (1991). Manual for the preparation of industrial feasibility studies. United Nations Industrial Development Organization.
Citazione stile Chigago Style (17a edizione)Behrens, W., e P. M. Hawranek. Manual for the Preparation of Industrial Feasibility Studies. Vienna: United Nations Industrial Development Organization, 1991.
Citatione MLA (9a ed.)Behrens, W., e P. M. Hawranek. Manual for the Preparation of Industrial Feasibility Studies. United Nations Industrial Development Organization, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.