APA aipamena

James, C. L. (1960). Principles of economics (9th ed.).

Chicago Style aipamena

James, Clifford L. Principles of Economics. 9th ed. 1960.

MLA aipamena

James, Clifford L. Principles of Economics. 9th ed. 1960.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.