Παραπομπή APA

Sijo, J. (1976). Economics for agriculturalists: A beginning text in agricultural economics. Grid.

Παραπομπή Chicago Style

Sijo, John. Economics for Agriculturalists: A Beginning Text in Agricultural Economics. Ohio: Grid, 1976.

Παραπομπή MLA

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