APA (7th ed.) Zitazioa

Schaffer, W. A. (1976). On the use of input-output models for regional planning. Martinus Nijhoff.

Chicago Style (17th ed.) Zitazioa

Schaffer, W. A. On the Use of Input-output Models for Regional Planning. Leiden: Martinus Nijhoff, 1976.

MLA (9th ed.) Zitazioa

Schaffer, W. A. On the Use of Input-output Models for Regional Planning. Martinus Nijhoff, 1976.