APA aipamena

Nobbs, J. (1973). Advanced level economics. McGraw-Hill.

Chicago Style aipamena

Nobbs, Jack. Advanced Level Economics. London: McGraw-Hill, 1973.

MLA aipamena

Nobbs, Jack. Advanced Level Economics. McGraw-Hill, 1973.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.