Hill, B. (1980). Introduction to economics for students of agriculture. Pergamon Press.
Chicago Style aipamenaHill, Berkeley. Introduction to Economics for Students of Agriculture. Oxford ; New York: Pergamon Press, 1980.
MLA aipamenaHill, Berkeley. Introduction to Economics for Students of Agriculture. Pergamon Press, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.