APA (7th ed.) Zitazioa

BARNES, R. (1967). Fundamentals of economics. Butterworths.

Chicago Style (17th ed.) Zitazioa

BARNES, R.J. Fundamentals of Economics. London: Butterworths, 1967.

MLA (9th ed.) Zitazioa

BARNES, R.J. Fundamentals of Economics. Butterworths, 1967.