Citazione Stile APA (7a Edizione)

Behrens, W., & Hawranek, P. M. (1991). Manual for the preparation of industrial feasibility studies (Newly rev. and expanded ed.). 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. Newly rev. and expanded ed. 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. Newly rev. and expanded ed. United Nations Industrial Development Organization, 1991.