Παραπομπή APA

Tinbergen, J., & Smith, N. D. (1967). Development planning. Weidenfeld and Nicolson.

Παραπομπή Chicago Style

Tinbergen, Jan, και N. D. Smith. Development Planning. London: Weidenfeld and Nicolson, 1967.

Παραπομπή MLA

Tinbergen, Jan, και N. D. Smith. Development Planning. Weidenfeld and Nicolson, 1967.