APA استشهاد

Richardson, H. W. (1972). Input-output and regional economics. Widenfeld and Nicholson.

استشهاد بنمط شيكاغو

Richardson, Harry W. Input-output and Regional Economics. London: Widenfeld and Nicholson, 1972.

MLA استشهاد

Richardson, Harry W. Input-output and Regional Economics. Widenfeld and Nicholson, 1972.