Ritson, C. (1977). Agricultural economics: Principles and Policy. Cros by Lockwood staples.
Chicago Style aipamenaRitson, Christopher. Agricultural Economics: Principles and Policy. London: Cros by Lockwood staples, 1977.
MLA aipamenaRitson, Christopher. Agricultural Economics: Principles and Policy. Cros by Lockwood staples, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.