APA (7th ed.) Zitazioa

(1981). The Dow Jones-Irwin guide to commodities trading / Bruce G. Gould.

Chicago Style (17th ed.) Zitazioa

The Dow Jones-Irwin Guide to Commodities Trading / Bruce G. Gould. 1981.

MLA (9th ed.) Zitazioa

The Dow Jones-Irwin Guide to Commodities Trading / Bruce G. Gould. 1981.