Behrens, W. W., & Hawranek, P. M. (1991). Manual for the preparation of industrial feasibility studies. United Nations Industrial Development Organization.
Tohutoru Kātū Chicago (17th ed.)Behrens, William W., me P. M. Hawranek. Manual for the Preparation of Industrial Feasibility Studies. Viena: United Nations Industrial Development Organization, 1991.
Tohutoro MLA (9th ed.)Behrens, William W., me P. M. Hawranek. Manual for the Preparation of Industrial Feasibility Studies. United Nations Industrial Development Organization, 1991.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.