Παραπομπή APA

Siegan, B. H. (1977). Planning without Prices. D. C. Reath.

Παραπομπή Chicago Style

Siegan, Bernard H. Planning Without Prices. Toronto: D. C. Reath, 1977.

Παραπομπή MLA

Siegan, Bernard H. Planning Without Prices. D. C. Reath, 1977.