APA aipamena

Sjo,John. (1976). Economics for agriculturalists: Beginning text in agricultural economics. Grid.

Chicago Style aipamena

Sjo,John. Economics for Agriculturalists: Beginning Text in Agricultural Economics. Olivo: Grid, 1976.

MLA aipamena

Sjo,John. Economics for Agriculturalists: Beginning Text in Agricultural Economics. Grid, 1976.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.